| Word | Definitions | Synonyms |
|---|---|---|
| tried | (adjective) tested and proved useful or correct | Synonyms: tested, well-tried |
| (adjective) tested and proved to be reliable | Synonyms: tested, time-tested, tried and true | |
| triennial | (adjective) occurring every third year or lasting 3 years | - |
| (noun) the 300th anniversary (or the celebration of it) | Synonyms: tercentenary, tercentennial | |
| trier | (noun) one who tries | Synonyms: attempter, essayer |
| (noun) one (as a judge) who examines and settles a case | - |