- Think little
- Think well of
- Thinker
- Thinner end
- Third force
- Third party insurance
- Third time
- Thirstiness
- Thirsty
- Thirsty person
- Thirteen
- Thirunavaya
- This
- This and that
- Thiswise
- Thither
- Thiyyas
- Tholas
- Thong
- Thorium
- Thoroughfare
- Thoroughness
- Those
- Thou
- Though
- Thoughtful
- Thoughtlessly
- Thoughts
- Thourough-fare
- Thoutlessness
- Thrashed grain
- Thrashing
- Thrashing machine
- Threaten
- Threateningly
- Three times five
- Three-quarter
- Threefold
- Threesome
- Threnody
- Thriller
- Thrips
- Throat-pain
- Throbbing
- Throe
- Throes
- Throng
- Throttle
- Throttle down
- Throughput
- Throw back
- Throw down the gauntlet
- Throw in the towel
- Throw oneself at
- Throwing up
- Thrown down
- Thrum
- Thrust
- Thruster
- Thud
- Thug life
- Thumb-mark
- Thumburu
- Thunder
- Thunderous
- Thursday
- Thwart
- Thymol seeds
- Thyroid
- Thyroxin
- Tick over
- Ticket
- Tickling
- Ticklish
- Tide-table
- Tide-wave
- 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
- Till death
- Tillable
- Tilt
- Timber-line
- Time card
- Time frame
- Time was
- Time-fuze
- Time-switch