- treaty
- treaty Indian
- treaty port
- treble
- treble chance
- treble clef
- treble staff
- trebuchet
- trecento
- tredecillion
- tree
- tree aster
- tree creeper
- tree cricket
- tree diagram
- tree ear
- tree farm
- tree fern
- tree frog
- tree fuchsia
- tree heath
- tree house
- tree hyrax
- tree kangaroo
- tree lawn
- tree layer
- tree line
- tree lupine
- tree mallow
- tree of Jesse
- tree of heaven
- tree of knowledge of good and evil
- tree of life
- tree peony
- tree poppy
- tree post
- tree ring
- tree runner
- tree shrew
- tree snail
- tree snake
- tree sparrow
- tree squirrel
- tree surgery
- tree swallow
- tree swift
- tree toad
- tree tobacco
- tree tomato
- tree yucca
- tree-and-branch
- tree-form frame
- tree-hugger
- treed
- treefish
- treehopper
- treehouse
- treelined
- treen
- treenail
- treenware
- treetop
- treeware
- tref
- treflé
- trefoil
- trefoil arch
- trefoil knot
- trehala
- trehalose
- treillage
- trek
- trekking
- trellis
- trellised
- trelliswork
- trematode
- tremble
- trembler
- trembles
- trembling poplar
- trembly
- tremendous
- tremendously
- tremie
- tremissis
- tremolant
- tremolite
- tremolo
- tremolo arm
- tremor
- tremulant
- tremulous
- trenail
- trench
- trench coat
- trench fever
- trench foot
- trench knife
- trench mortar
- trench mouth
- trench warfare
- trenchant
- trencher
- trencherman
- trenches
- trend
- trendify
- trending
- trendline
- trendsetter
- trendsetting
- trendy
- trental
- trente et quarante
- trepan
- trepang
- trephine
- trepid
- trepidant
- trepidation
- treponema
- treponematosis
- treponemiasis
- tres-tine
- trespass
- tress
- tressed
- tressure
- tressy
- trestle
- trestle table
- trestletree
- trestlework
- tret
- tretinoin
- trevally
- trews
- trey
- trez-tine
- trf
- tri-
- tri-band
- tri-city
- tri-state
- tri-tip
- triable
- triac
- triacetate
- triacetate fiber
- triacid
- triacontanol
- triad
- triadelphous
- triadic
- triage
- trial
- trial and error
- trial balance
- trial balloon
- trial by battle
- trial by fire
- trial court
- trial examiner
- trial horse
- trial jury
- trial lawyer
- trial marriage
- trial run
- triallist
- trialogue
- trials and tribulations
- trialware
- triamcinolone
- triangle
- triangle inequality
- triangle of forces
- triangular
- triangular matrix
- triangular trade
- triangulate
- triangulation
- triangulation station
- triannual
- triapsidal
- triarchy
- triaryl
- triarylmethane dye
- triathlete
- triathlon
- triatic stay
- triatomic
- triaxial
- triazine
- triazoic
- triazole
- trib.
- tribade
- tribadism
- tribal
- tribalism
- tribasic
- tribe
- tribelet
- tribesman
- tribespeople
- tribeswoman
- triblet
- tribo-
- triboelectricity
- tribology
- triboluminescence
- tribrach
- tribromide
- tribromoacetaldehyde
- tribromoethanol
- tribulation
- tribunal
- tribunate
- tribune
- tributary
- tribute
- tribute band
- tricalcium silicate
- tricameral
- tricarboxylic
- tricarboxylic acid cycle
- tricarpellary
- trice
- tricentenary
- tricentennial
- tricep
- triceps
- triceratops
- trich-
- trichiasis
- trichina
- trichinize
- trichinosis
- trichinous
- trichion
- trichite
- trichlorfon
- trichloride
- trichloroacetaldehyde
- trichloroacetic acid
- trichloroethane
- trichloroethylene
- trichlorofluoromethane
- trichloromethane
- trichloromethyl chloroformate
- trichloronitromethane
- trichlorophenoxyacetic acid
- tricho-
- trichocyst
- trichogramma
- trichogyne
- trichoid
- trichology
- trichome
- trichomonad
- trichomonas
- trichomoniasis
- trichonotid
- trichonymph
- trichopteran
- trichopteron
- trichopterous
- trichosis
- trichothecene
- trichotillomania
- trichotomy
- trichotomy property
- trichroic
- trichroism
- trichromat
- trichromatic
- trichromatism
- trichuriasis
- trick
- trick cyclist
- trick ending
- trick knee
- trick or treat
- trick out
- trick-or-treat
- trick-track
- trickery
- trickish
- trickle
- trickle charge
- trickle charger
- trickle irrigation
- trickle-down
- trickle-down theory
- trickle-up
- tricks of the trade
- tricksome
- trickster
- tricksy