| Term | Definition |
| teeming | crowded , packed |
| teleology | the study of design or purpose in natural phenomena |
| tenable | acceptable , reasonable |
| tenebrous | dark , gloomy , obscure |
| terrazzo | strips , floor covering |
| terseness | shortness , brevity |
| testify | to bear witness , give or afford evidence |
| tetrad | a group of four |
| timorous | full of fear ; fearful |
| tumid | swollen , or affected with swelling , as a part of the body . pompous or inflated , as language ; turgid ; bombastic |
| turpitude | vile , shameful , or base character ; depravity |
| twangier | nasal speech or resonance |