| Term | Definition |
| reconnaissance | survey of enemy by soldiers |
| recount | tell, count again |
| recourse | resorting to help when in trouble |
| recrimination | countercharges |
| rectify | correct |
| rectitude | correctness of judgment |
| recumbent | reclining |
| recuperate | recover |
| recurrent | occurring again |
| redolent | odorous |
| redoubtable | causing fear |
| redress | remedy, compensation |
| regime | method of government |
| reek | emit |
| refraction | bending of light |
| refractory | stubborn, unmanageable |
| refrain | chorus |
| refute | disprove |
| regal | royal |
| regale | entertain |
| regeneration | renewal, restoration |
| regimen | prescribed diet and habits |
| rehabilitate | restore to proper condition |
| reiterate | repeat |
| rejoinder | comeback |
| rejuvenate | make young again |
| relegate | banish to an inferior position, assign |
| relent | give in |
| relic | memento |
| relish | savor, enjoy |
| remediable | reparable |
| remedial | corrective |
| remiss | negligent |
| remission | temporary disease symptoms, cancellation of debt, pardon |
| remnant | remainder |
| remonstrance | protest |
| remorse | guilt |
| remunerative | rewarding |
| rend | split |
| render | deliver, provide |
| renegade | traitor |
| rent | rip |
| reparable | capable of being repaired |
| reparation | compensation |
| repast | feast |
| repeal | annul |
| repel | drive away, disgust |
| repercussion | result of rebound |
| repertoire | list of works to present |
| replete | stuffed |
| repository | storehouse |
| reprehensible | deserving blame |
| repress | restrain |
| reprieve | temporary stay |
| reprimand | rebuke |
| reprisal | retaliation |
| reprise | recurring action |
| reproach | express disapproval |
| reprobate | person hardened in sin |
| reprove | rebuke |
| repudiate | disown |
| repugnant | loathsome |
| repulsion | distaste, act of driving back |
| reputable | respectable |
| reputed | supposed |
| requiem | mass for the dead |
| requisite | necessary requirement |
| requite | revenge |
| rescind | cancel |
| reserve | self control, formal but distant manner |
| resigned | accepting one's fate, unresisting |
| resilient | elastic |
| resolution | determination |
| resolve | determination, firmness of purpose |
| resonant | echoing, deep and full in sound |
| respite | interval of relief |
| resplendent | dazzling |
| restitution | reparation |
| restive | impatient, resisting control |
| resumption | recommencement |
| resurge | rise again, flow to and from |
| retain | keep, employ |
| retaliation | repayment |
| retentive | able to retain, remember |