| Trigraph | trigraph |
| Digraph | digraph bigraph digram |
| Epigraph | epigraph |
| Triumph | triumph |
| Geograph | geographer |
| Typograph | typographer |
| -graph | -graph |
| Graph | graph grapheme |
| Myograph | myograph |
| Paragraph | paragraph |
| Triade | triad |
| Trich | trichotillomania |
| Trimaran | trimaran |
| Trireme | trireme |
| Tristan | Tristan |
| Trivia | trivia |
| trigonal | trigonal |
| Triage | triage |
| Trial | trial |
| Trias | Triassic |