| telltale | That gives warning or information. |
| temerity | Recklessness. |
| temporal | Pertaining to or concerned with the affairs of the present life. |
| temporary | Lasting for a short time only. |
| temporize | To pursue a policy of delay. |
| tempt | To offer to (somebody) an inducement to do wrong. |
| tempter | An allurer or enticer to evil. |
| tenacious | Unyielding. |
| tenant | An occupant. |
| tendency | Direction or inclination, as toward some objector end. |
| tenet | Any opinion, principle, dogma, or doctrine that a person believes or maintains as true. |
| tenor | A settled course or manner of progress. |
| tense | Strained to stiffness. |
| tentative | Done as an experiment. |
| tenure | The term during which a thing is held. |
| tercentenary | Pertaining to a period of 300 years. |
| termagant | Violently abusive and quarrelsome. |
| terminal | Pertaining to or creative of a boundary, limit. |
| terminate | To put an end or stop to. |
| termination | The act of ending or concluding. |
| terminus | The final point or goal. |
| terrify | To fill with extreme fear. |
| territorial | Pertaining to the domain over which a sovereign state exercises jurisdiction. |
| terse | Pithy. |
| testament | A will. |
| testator | The maker of a will. |
| testimonial | A formal token of regard, often presented in public. |
| thearchy | Government by a supreme deity. |
| theism | Belief in God. |
| theocracy | A government administered by ecclesiastics. |
| theocrasy | The mixed worship of polytheism. |
| theologian | A professor of divinity. |
| theological | Based on or growing out of divine revelation. |
| theology | The branch of theological science that treats of God. |
| theoretical | Directed toward knowledge for its own sake without respect to applications. |
| theorist | One given to speculating. |
| theorize | To speculate. |
| thereabout | Near that number, quantity, degree, place, or time, approximately. |
| therefor | For that or this. |
| thermal | Of or pertaining to heat. |
| thermoelectric | Denoting electricity produced by heat. |
| thermoelectricity | Electricity generated by differences of temperature, |
| thesis | An essay or treatise on a particular subject. |
| thoroughbred | Bred from the best or purest blood or stock. |
| thoroughfare | A public street or road. |
| thrall | One controlled by an appetite or a passion. |
| tilth | Cultivation. |
| timbre | The quality of a tone, as distinguished from intensity and pitch. |
| timorous | Lacking courage. |
| tincture | A solution, usually alcoholic, of some principle used in medicine. |