- tricot
- tricycle
- trident
- tridimensional
- tried
- triennial
- trier
- trifle
- trifled
- trifling
- trifoliate
- triform
- trig
- trigger
- trigonometric
- trigonometry
- trigonous
- trihedral
- trihedron
- trilateral
- trilinear
- trilingual
- triliteral
- trill
- trilling
- trillion
- trilobate
- trilogy
- trim
- trimester
- trimeter
- trimmed
- trimmer
- trimming
- trine
- trinitarian
- trinity
- trinket
- trinomial
- trio
- triolet
- trip
- trip hammer
- trip up
- tripartite
- tripe
- tripedal
- tripetalous
- triphthong
- triple
- tripled
- triplet
- triplicate
- triplication
- tripling
- triply
- tripod
- tripos
- tripped
- tripper
- tripping
- trippingly
- triptych
- triquetrous
- trireme
- trisect
- trisection
- trismus
- trisyllabic
- trisyllable
- trite
- triturate
- triturated
- triturating
- trituration
- triumph
- triumphal
- triumphed
- triumphing
- triumvir
- triumvirate
- triumviri
- triumvirs
- triune
- trivet
- trivial
- trivialities
- triviality
- triweekly
- trochaic
- troche
- trochee
- trod
- trodden
- troglodyte
- troglodytes
- trojan
- troll
- trolled
- trolley