- Thinker
- Thiswise
- Thither
- Thiyyas
- Tholas
- Thong
- Thorium
- Thoroughfare
- Thoroughness
- Those
- Thou
- Though
- Thoughtful
- Three times five
- Three-quarter
- Threefold
- Threesome
- Threnody
- Thriller
- Thrips
- Throat-pain
- Throbbing
- Throe
- Thrust
- Thruster
- Thud
- Thug life
- Thumb-mark
- Thumburu
- Thunder
- Thunderous
- Thursday
- Thwart
- Thymol seeds
- Thyroid
- Thyroxin
- Tied to one's mother's apron strings
- Tied-house
- Tiff
- Tiger by the tail
- Tiger skin
- Tight corner of spot
- Tight-lipped
- Tight-rope
- Tighten
- Tigon
- Tigress
- Til oil
- Tile
- Tile-stone
- Till
- Time-fuze
- Time-switch
- Timely
- Times
- Timesheet
- Timetested
- Timidity
- Timidly
- Timpani
- Tin man
- Tinctorial
- Tire
- Tirelessly
- Tiresome
- Titchy
- Tithe
- Title bar
- Title-role
- Titled
- Titmouse
- Titration
- To be determined
- To be frightened
- To be fulfilled to
- To be going to
- To be in the same boat
- To be offended
- To become able
- To become big
- To become complete
- To become enslavened
- To become full
- To become satisfied
- To begin
- To bet
- Tow
- To bid farewell
- To blame
- To bloat
- To borrow
- To cleanse
- To comb
- To command
- To confess under duress
- To control ones passions
- To cross
- To defend
- To eat
- To embark