| Term | Definition |
| rabid | Affected with rabies or hydrophobia. |
| racy | Exciting or exhilarating to the mind. |
| radiance | Brilliant or sparkling luster. |
| radiate | To extend in all directions, as from a source or focus. |
| radical | One who holds extreme views or advocates extreme measures. |
| radix | That from or on which something is developed. |
| raillery | Good-humored satire. |
| ramify | To divide or subdivide into branches or subdivisions. |
| ramose | Branch-like. |
| rampant | Growing, climbing, or running without check or restraint. |
| rampart | A bulwark or construction to oppose assault or hostile entry. |
| rancor | Malice. |
| rankle | To produce irritation or festering. |
| rapacious | Disposed to seize by violence or by unlawful or greedy methods. |
| rapid | Having great speed. |
| rapine | The act of seizing and carrying off property by superior force, as in war. |
| rapt | Enraptured. |
| raptorial | Seizing and devouring living prey. |
| ration | To provide with a fixed allowance or portion, especially of food. |
| rationalism | The formation of opinions by relying upon reason alone, independently of authority. |
| raucous | Harsh. |
| ravage | To lay waste by pillage, rapine, devouring, or other destructive methods. |
| ravenous | Furiously voracious or hungry. |
| ravine | A deep gorge or hollow, especially one worn by a stream or flow of water. |
| reaction | Tendency towards a former, or opposite state of things, as after reform, revolution, or inflatio, |
| reactionary | Pertaining to, of the nature of, causing, or favoring reactio, |
| readily ad | Without objection or reluctance. |
| readjust | To put in order after disarrangement. |
| ready | In a state of preparedness for any given purpose or occasio, |
| realism | The principle and practice of depicting persons and scenes as they are believed really to exist. |
| rearrange | To arrange again or in a different order. |
| reassure | To give new confidence. |
| rebellious | Insubordinate. |
| rebuff | A peremptory or unexpected rejection of advances or approaches. |
| rebuild | To build again or anew. |
| rebut | To oppose by argument or a sufficient answer. |
| recant | To withdraw formally one's belief (in something previously believed or maintained). |
| recapitulate | To repeat again the principal points of. |
| recapture | To capture agai, |
| recede | To move back or away. |
| receivable | Capable of being or fit to be received - often money. |
| receptive | Having the capacity, quality, or ability of receiving, as truths or impressions. |
| recessive | Having a tendency to go back. |
| recidivist | A confirmed criminal. |
| reciprocal | Mutually interchangeable or convertible. |
| reciprocate | To give and take mutually. |
| reciprocity | Equal mutual rights and benefits granted and enjoyed. |
| recitation | The act of reciting or repeating, especially in public and from memory. |
| reck | To have a care or thought for. |
| reckless | Foolishly headless of danger. |
| reclaim | To demand or to obtain the return or restoration of. |
| recline | To cause to assume a leaning or recumbent attitude or positio, |
| recluse | One who lives in retirement or seclusio, |
| reclusory | A hermitage. |
| recognizance | An acknowledgment entered into before a court with condition to do some particular act. |
| recognize | To recall the identity of (a person or thing). |
| recoil | To start back as in dismay, loathing, or dread. |
| recollect | To recall the knowledge of. |
| reconcilable | Capable of being adjusted or harmonized. |
| reconnoiter | To make a preliminary examination of for military, surveying, or geological purposes. |
| reconsider | To review with care, especially with a view to a reversal of previous actio, |
| reconstruct | To rebuild. |
| recourse | Resort to or application for help in exigency or trouble. |
| recover | To regai, |
| recreant | A cowardly or faithless perso, |
| recreate | To refresh after labor. |
| recrudescence | The state of becoming raw or sore agai, |
| recrudescent | Becoming raw or sore agai, |
| recruit | To enlist men for military or naval service. |
| rectify | To correct. |
| rectitude | The quality of being upright in principles and conduct. |
| recuperate | To recover. |
| recur | To happen again or repeatedly, especially at regular intervals. |
| recure | To cure agai, |
| recurrent | Returning from time to time, especially at regular or stated intervals. |
| redemption | The recovery of what is mortgaged or pledged, by paying the debt. |
| redolent | Smelling sweet and agreeable. |
| redolence | Smelling sweet and agreeable. |
| redoubtable | Formidable. |
| redound | Rebound. |
| redress | To set right, as a wrong by compensation or the punishment of the wrong-doer. |
| reducible | That may be reduced. |
| redundance | Excess. |
| redundant | Constituting an excess. |
| reestablish | To restore. |
| refer | To direct or send for information or other purpose. |
| referrer | One who refers. |
| referable | Ascribable. |
| referee | An umpire. |
| refinery | A place where some crude material, as sugar or petroleum, is purified. |
| reflectible | Capable of being turned back. |
| reflection | The throwing off or back of light, heat, sound, or any form of energy that travels in waves. |
| reflector | A mirror, as of metal, for reflecting light, heat, or sound in a particular directio, |
| reflexible | Capable of being reflected. |
| reform | Change for the better. |
| reformer | One who carries out a reform. |
| refract | To bend or turn from a direct course. |
| refractory | Not amenable to control. |
| refragable | Capable of being refuted. |
| refringency | Power to refract. |
| refringent | Having the power to refract. |
| refusal | Denial of what is asked. |
| refute | To prove to be wrong. |
| regale | To give unusual pleasure. |
| regalia | pl. The emblems of royalty. |
| regality | Royalty. |
| regenerate | To reproduce. |
| regent | One who is lawfully deputized to administer the government for the time being in the name of the ruler. |
| regicide | The killing of a king or sovereig, |
| regime | Particular conduct or administration of affairs. |
| regimen | A systematized order or course of living with reference to food, clothing and personal habits. |
| regiment | A body of soldiers. |
| regnant | Exercising royal authority in one's own right. |
| regress | To return to a former place or conditio, |
| regretful | Feeling, expressive of, or full of regret. |
| rehabilitate | To restore to a former status, capacity, right rank, or privilege. |
| reign | To hold and exercise sovereign power. |
| reimburse | To pay back as an equivalent of what has been expended. |
| rein | A step attached to the bit for controlling a horse or other draft-animal. |
| reinstate | To restore to a former state, station, or authority. |
| reiterate | To say or do again and agai, |
| rejoin | To reunite after separatio, |
| rejuvenate | To restore to youth. |
| rejuvenescence | A renewal of youth. |
| relapse | To suffer a return of a disease after partial recovery. |
| relegate | To send off or consign, as to an obscure position or remote destinatio, |
| relent | To yield. |
| relevant | Bearing upon the matter in hand. |
| reliance | Dependence. |
| reliant | Having confidence. |
| relinquish | To give up using or having. |
| reliquary | A casket, coffer, or repository in which relics are kept. |
| relish | To like the taste or savor of. |
| reluctance | Unwillingness. |
| reluctant | Unwilling. |
| remembrance | Recollectio, |
| reminiscence | The calling to mind of incidents within the range of personal knowledge or experience. |
| reminiscent | Pertaining to the recollection of matters of personal interest. |
| remiss | Negligent. |
| remission | Temporary diminution of a disease. |
| remodel | Reconstruct. |
| remonstrance | Reproof. |
| remonstrant | Having the character of a reproof. |
| remonstrate | To present a verbal or written protest to those who have power to right or prevent a wrong. |
| remunerate | To pay or pay for. |
| remuneration | Compensatio, |
| Renaissance | The revival of letters, and then of art, which marks the transition from medieval to modern time. |
| rendezvous | A prearranged place of meeting. |
| rendition | Interpretatio, |
| renovate | To restore after deterioration, as a building. |
| renunciation | An explicit disclaimer of a right or privilege. |
| reorganize | To change to a more satisfactory form of organizatio, |
| reparable | Capable of repair. |
| reparation | The act of making amends, as for an injury, loss, or wrong. |
| repartee | A ready, witty, or apt reply. |
| repeal | To render of no further effect. |
| repel | To force or keep back in a manner, physically or mentally. |
| repellent | Having power to force back in a manner, physically or mentally. |
| repentance | Sorrow for something done or left undone, with desire to make things right by undoing the wrong. |
| repertory | A place where things are stored or gathered together. |
| repetition | The act of repeating. |
| repine | To indulge in fretfulness and faultfinding. |
| replenish | To fill again, as something that has been emptied. |
| replete | Full to the uttermost. |
| replica | A duplicate executed by the artist himself, and regarded, equally with the first, as an original. |
| repository | A place in which goods are stored. |
| reprehend | To find fault with. |
| reprehensible | Censurable. |
| reprehension | Expression of blame. |
| repress | To keep under restraint or control. |
| repressible | Able to be kept under restraint or control. |
| reprieve | To grant a respite from punishment to. |
| reprimand | To chide or rebuke for a fault. |
| reprisal | Any infliction or act by way of retaliation on an enemy. |
| reprobate | One abandoned to depravity and si, |
| reproduce | To make a copy of. |
| reproduction | The process by which an animal or plant gives rise to another of its kind. |
| reproof | An expression of disapproval or blame personally addressed to one censured. |
| repudiate | To refuse to have anything to do with. |
| repugnance | Thorough dislike. |
| repugnant | Offensive to taste and feeling. |
| repulse | The act of beating or driving back, as an attacking or advancing enemy. |
| repulsive | Grossly offensive. |
| repute | To hold in general opinio, |
| requiem | A solemn mass sung for the repose of the souls of the dead. |
| requisite | Necessary. |
| requital | Adequate return for good or ill. |
| requite | To repay either good or evil to, as to a perso, |
| rescind | To make void, as an act, by the enacting authority or a superior authority. |
| reseat | To place in position of office agai, |
| resemblance | Similarity in quality or form. |
| resent | To be indignant at, as an injury or insult. |
| reservoir | A receptacle where a quantity of some material, especially of a liquid or gas, may be kept. |
| residue | A remainder or surplus after a part has been separated or otherwise treated. |
| resilience | The power of springing back to a former position |
| resilient | Having the quality of springing back to a former positio, |
| resistance | The exertion of opposite effort or effect. |
| resistant | Offering or tending to produce resistance. |
| resistive | Having or exercising the power of resistance. |
| resistless | Powerless. |
| resonance | The quality of being able to reinforce sound by sympathetic vibrations. |
| resonance | Able to reinforce sound by sympathetic vibrations. |
| resonate | To have or produce resonance. |
| resource | That which is restored to, relied upon, or made available for aid or support. |
| respite | Interval of rest. |
| resplendent | Very bright. |
| respondent | Answering. |
| restitution | Restoration of anything to the one to whom it properly belongs. |
| resumption | The act of taking back, or taking agai, |
| resurgent | Surging back or agai, |
| resurrection | A return from death to life |
| resuscitate | To restore from apparent death. |
| retaliate | To repay evil with a similar evil. |
| retch | To make an effort to vomit. |
| retention | The keeping of a thing within one's power or possessio, |
| reticence | The quality of habitually keeping silent or being reserved in utterance. |
| reticent | Habitually keeping silent or being reserved in utterance. |
| retinue | The body of persons who attend a person of importance in travel or public appearance. |
| retort | A retaliatory speech. |
| retouch | To modify the details of. |
| retrace | To follow backward or toward the place of beginning, as a track or marking. |
| retract | To recall or take back (something that one has said). |
| retrench | To cut down or reduce in extent or quantity. |
| retrieve | To recover something by searching. |
| retroactive | Operative on, affecting, or having reference to past events, transactions, responsibilities. |
| retrograde | To cause to deteriorate or to move backward. |
| retrogression | A going or moving backward or in a reverse directio, |
| retrospect | A view or contemplation of something past. |
| retrospective | Looking back on the past. |
| reunite | To unite or join again, as after separatio, |
| revelation | A disclosing, discovering, or making known of what was before secret, private, or unknow, |
| revere | To regard with worshipful veneratio, |
| reverent | Humble. |
| reversion | A return to or toward some former state or conditio, |
| revert | To return, or turn or look back, as toward a former position or the like. |
| revile | To heap approach or abuse upo, |
| revisal | Revisio, |
| revise | To examine for the correction of errors, or for the purpose of making changes. |
| revocation | Repeal. |
| revoke | To rescind. |
| rhapsody | Rapt or rapturous utterance. |
| rhetoric | The art of discourse. |
| rhetorician | A showy writer or speaker. |
| ribald | Indulging in or manifesting coarse indecency or obscenity. |
| riddance | The act or ridding or delivering from something undesirable. |
| ridicule | Looks or acts expressing amused contempt. |
| ridiculous | Laughable and contemptible. |
| rife | Abundant. |
| righteousness | Rectitude. |
| rightful | Conformed to a just claim according to established laws or usage. |
| rigmarole | Nonsense. |
| rigor | Inflexibility. |
| rigorous | Uncompromising. |
| ripplet | A small ripple, as of water. |
| risible | capable of exciting laughter. |
| rivulet | A small stream or brook. |
| robust | Characterized by great strength or power of endurance. |
| rondo | A musical composition during which the first part or subject is repeated several times. |
| rookery | A place where crows congregate to breed. |
| rotary | Turning around its axis, like a wheel, or so constructed as to turn thus. |
| rotate | To cause to turn on or as on its axis, as a wheel. |
| rote | Repetition of words or sounds as a means of learning them, with slight attentio, |
| rotund | Round from fullness or plumpness. |
| rudimentary | Being in an initial, early, or incomplete stage of development. |
| rue | To regret extremely. |
| ruffian | A lawless or recklessly brutal fellow. |
| ruminant | Chewing the cud. |
| ruminate | To chew over again, as food previously swallowed and regurgitated. |
| rupture | To separate the parts of by violence. |
| rustic | Characteristic of dwelling in the country. |
| ruth | Sorrow for another's misery. |