thin
Having little thickness or extent from one surface to its opposite.
Very narrow in all diameters; having a cross section that is small in all directions.
Having little body fat or flesh; slim; slender; lean; gaunt.
Of low viscosity or low specific gravity.
Scarce; not close, crowded, or numerous; not filling the space.
Describing a poorly played golf shot where the ball is struck by the bottom part of the club head. See fat, shank, toe.
Lacking body or volume; small; feeble; not full.
Slight; small; slender; flimsy; superficial; inadequate; not sufficient for a covering.
Of a route: relatively little used.
Poor; scanty; without money or success.

thinner
comparative form of thin: more thin

thinnest
superlative form of thin: most thin

threadbare
Of cloth, clothing, furnishings, etc.: frayed and worn to an extent that the nap is damaged and the warp and weft threads show; shabby, worn-out.
In poor condition; damaged, shabby; also, poorly equipped or provided for, inadequate, meagre, scanty.
Of an argument, excuse, etc.: used so often that it is no longer effective or interesting; banal, clichéd, trite.
An argument or assertion with little in the way of substance or supporting evidence.
Of a person: wearing clothes of threadbare (sense 1) material; hence, impoverished, poor.

threepennies
plural of threepenny

threepenny
Having a value or cost of threepence.
Of little worth; mean; vulgar.

thrippenny
Alternative form of threepenny.

thruppeny
Alternative form of threepenny.

tichier
comparative form of tichy: more tichy

tichiest
superlative form of tichy: most tichy

tichy
Alternative form of titchy (“very small”).

tickier
comparative form of ticky: more ticky

tickies
plural of ticky

tickiest
superlative form of ticky: most ticky

ticky
infested with ticks (the tiny woodland arthropod of the order Acarina).

tiddier
comparative form of tiddy: more tiddy

tiddies
plural of tiddy

tiddiest
superlative form of tiddy: most tiddy

tiddlies
plural of tiddly

tiddly
An alcoholic beverage.

tiddy
The European wren.

tidgy
Very small; teensy.

tiiiny
Elongated form of tiny.

tinchy
Very small; tiny; titchy.

tinier
comparative form of tiny: more tiny

tinies
plural of tiny

tiniest
superlative form of tiny: most tiny

tiny
Very small.

titchier
comparative form of titchy: more titchy

titchiest
superlative form of titchy: most titchy

titchy
Alternative form of tetchy: touchy, easily annoyed, irritated, or offended.

titless
Without breasts, or having only small ones.

titsy
Very small; teensy.

toaty
Alternative form of totty.

toric
Pertaining to or shaped like a torus, or a section of a torus; toroidal.
Pertaining to or shaped like a torus, or a section of a torus; toroidal.
Pertaining to or shaped like a torus, or a section of a torus; toroidal.
Pertaining to or shaped like a torus, or a section of a torus; toroidal.
Pertaining to or shaped like a torus, or a section of a torus; toroidal.
Pertaining to or shaped like a torus, or a section of a torus; toroidal.

torulaform
Having the appearance of a torula; in the form of a little chain.

toruliform
Shaped like a torula, or small torus.

toruloid
Minutely torose; shaped like a small torus.
Resembling a torula (type of yeast).

toyous
Having little importance; trivial, pointless.

transmicrovascular
Across or through extremely small blood vessels

trifoveolate
Having three small pits or depressions.

triticeal
Shaped like a grain of wheat, especially denoting to the pair of small cartilages in the larynx.

trivial
Ignorable; of little significance or value.
Commonplace, ordinary.
Concerned with or involving trivia.
Relating to or designating the name of a species; specific as opposed to generic.
Of, relating to, or being the simplest possible case.
Of, relating to, or being the simplest possible case.
Self-evident.
Pertaining to the trivium.
Indistinguishable in case of truth or falsity.

triviall
Obsolete spelling of trivial.

trivials
plural of trivial

tubulated
Having the form of a small tube, or composed of a tube, or elongated opening.

tubuliform
Having the form of a small tube, or tubule.

tuftier
comparative form of tufty: more tufty

tufties
plural of tufty

tuftiest
superlative form of tufty: most tufty

tufty
Having the form of or resembling a tuft (“a bunch of grass, hair, etc., held together at the base”).
Covered in or having many tufts.
Covered in or having many tufts.
Growing in tufts.

tumulous
Full of small hills or mounds; hilly; tumulose.

tuppennies
plural of tuppenny

tuppenny
Literally, worth tuppence (two pence); of little value or status.

turriculate
Furnished with, or formed like, a small turret or turrets; somewhat turreted.

twistless
Having, or producing no (or very little) twist

twopennies
plural of twopenny

twopenny
Having a value or cost of twopence.
Cheap; worthless; petty.

tyny
Obsolete form of tiny.

ultracompact
Extremely compact; of utmost compactness.

ultralight
Extremely light; weighing very little.

ultramafic
Describing igneous rocks that contain magnesium and iron and only a very small amount of silica, such as are found in the Earth’s mantle.

ultramafics
plural of ultramafic

ultramafite
ultramafic rock

ultramicroscopic
Too small to be seen with an ordinary microscope.
Of or relating to ultramicroscopy.

ultraminiature
Extremely small; highly miniaturized.

ultraminute
extremely minute

ultrasmall
Extremely or exceedingly small.

ultratiny
extremely tiny

ultraviolet
Of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 to 10 nanometres.
Relating to very high energies or very small distances or time spans.

ultraviolets
plural of ultraviolet

umbilicate
Having a navel.
Having a small umbo in a central depression, or a depression in the center of the cap.
Supported by a central stalk.

umbilicated
Alternative form of umbilicate.

umbonulate
Having a small umbo.

unambitious
Having little ambition for success or achievement

unappreciable
Too small or insignificant to be noticed.

unbuxom
Having small breasts; not buxom.

underambitious
Having too little ambition.

underchlorinated
Containing too little chlorine.

undercollateralized
Collateralized for too small an amount.

undercovered
Insufficiently covered (against risk).
Having too little coverage.

underdanced
Of a theatrical production, etc.: featuring too little dancing.

underdimensioned
Having inadequate physical dimensions; too small.

underdisciplined
disciplined too little

underendowed
Insufficiently endowed.
Having small breasts or buttocks.
Having a small penis.

underengined
having too small an engine in relation to its size.

underexclusive
Not exclusive enough; tending to exclude too little.

underfollowed
Not adequately followed; having too small a following.

underhedged
On a hedged a transaction, having too much cash flow committed to rated note debt coverage, leaving too little available for the income notes.

underinclusive
Not inclusive enough; tending to include too little.

underinfluenced
Too little influenced.

underinventoried
Having too little of something in stock.

underlevered
Having too little leverage.

underpaid
Getting too little financial compensation for one's work.

underproportioned
Of inadequate or inferior proportions; small; poor.

undersalaried
Given too small a salary; underpaid.

undersanded
Containing too little sand.

undershapen
Under the usual size; dwarfish; small.

undersize
Smaller than normal, undersized.
Smaller than appropriate, expected or sufficient.
Small enough to fit through a screen.

undertouristed
Having relatively little tourism.

unemotional
Showing little or no feeling.
Reasoned and objective, involving reason or intellect rather than feelings.

unifoveolate
Having a single small pit or depression.

uninteresting
Arousing little or no interest; boring or uneventful.