- trigger spray
- trigger-happy
- triggering factor
- trigonometric
- trigonometry
- trigram
- trigraph
- trike
- trilateral
- trilby
- trilingual
- trill
- trillion
- trilogy
- trim
- trim track
- trimaran
- trimester
- trimmer
- trimming
- trimonthly
- trinary
- Trinidad
- Trinidad and Tobago
- Trinidadian
- trinitroglycerin
- trinitrotoluene
- trinity
- trinket
- trinomial
- trio
- trio sonata
- triode
- triolet
- trip
- trip recorder
- trip switch
- tripartite
- tripe
- triphammer
- triphase
- trip-hop
- triphthong
- triplane
- triple
- Triple Alliance
- triple jump
- triple time
- triplet
- Triplex
- triplex
- triplicate
- triply
- tripod
- tripos
- tripper
- trippy
- triptych
- tripwire
- trireme
- trisect
- trisyllabic
- trisyllable
- trite
- tritely
- tritium
- triton
- tritone
- triturate
- trituration
- triumph
- triumphal
- triumphalist
- triumphant
- triumphantly
- triumvirate
- triune
- trivalent
- trivet
- trivia
- trivial
- triviality
- trivialize
- triweekly
- t-RNA
- trochaic
- trochee
- trog
- troglodyte
- troika
- troilism
- Trojan
- Trojan Horse
- Trojan War
- troll
- trolley
- trolley car
- trolley case
- trolleybus
- trollop
- trombone
- trombonist
- troop
- troop carrier
- trooper
- trooping
- troopship
- trope
- trophic
- trophy
- trophy wife
- tropic
- tropical
- tropism
- troposphere
- trot
- troth
- trotline
- Trotsky
- Trotskyist
- Trotskyite
- trotter
- troubadour
- trouble
- trouble spot
- troubled
- trouble-free
- troublemaker
- troubleshoot
- troubleshooter
- troubleshooting
- troublesome
- troubling
- trough
- trounce
- trouncing
- troupe
- trouper
- trouser
- trouser press
- trouser suit
- trousers
- trousseau
- trout
- trove
- trow
- trowel
- troy
- Troy
- truancy
- truant
- truant officer
- truce
- truck
- truck driver
- truck farm
- truck farmer
- truck garden
- truck stop
- truckage
- trucker
- trucking
- truckle
- truckle bed
- truckload
- truckman
- truculence
- truculent
- truculently
- trudge
- true
- true north
- true-blue
- trueborn
- truebred
- truehearted
- true-life
- truelove
- truffle
- trug
- truism
- truly
- trump
- trump card
- trumped-up
- trumpery
- trumpet
- trumpet call
- trumpeter
- trumpeting
- truncate
- truncated
- truncheon
- trundle
- trundle bed
- trunk
- trunk call
- trunk line
- trunk road
- trunnion