thanks, n. pl. gramercy (many thanks).

theater, n. playhouse; odeon, lyceum; arena, stage, scene, field.

theatrical, a. dramatic, histrionic, scenic; stagy, artificial.

theft, n.  See stealing.

theory, n. hypothesis.

thick, a. dense, coagulated, crass, gross, inspissate, inspissated, grumous, incrassated; compact, turbid, roily, feculent, muddy; (Colloq.) intimate, confidential.

thicken, v. coagulate, condense, inspissate, curdle, concrete, incrassate.

thickening, a. inspissant.

thickening, n. inspissation, condensation, coagulation, incrassation.

thicket, n. shrubbery, copse, chaparral, grove, boscage, bosk, spinny, coppice.

thick-headed, a. pachycephalic, pachycephalous; dull, stupid, doltish.

thicklip, n. blobberlip.

thickness, n. denseness, density, compactness; grossness, crassitude, consistence; intimacy.  Associated Words:  pachometer, pachymeter.

thick-skinned, a. pachydermatous; obtuse, dull, unimpressible.

thick-tongued, a. pachyglossal, crassilingual.

thief, n. robber, pilferer, filcher, peculator; embezzler, defaulter, peculator; plagiarist; poacher; shoplifter; kleptomaniac.

thievery, n. theft, larceny; embezzlement, peculation; shoplifting.

thievish, a. light-fingered, pilfering, predatory; stealthy, sneaking.

thill, n. shaft (of a vehicle).

thin, a. emaciated, slender, poor, wasted, peaked, gaunt, scrawny, lank, spare, meager, haggard, scraggy; tenuous, delicate, fine; incompact; dilute, rare, rarefied, subtile, attenuated; sheer, flimsy, sleazy, unsubstantial, gossamery, gauzy, diaphanous, transparent; sparse, scanty; inadequate, insufficient, superficial.

thin, v. dilute, reduce, attenuate, rarefy, diminish, subtilize.

thing, n. object, article.

things, n. pl. (Colloq.) clothes, furniture, appurtenances, belongings, goods, luggage, accessories, chattels, effects, traps, impedimenta (Mil.), paraphernalia.

think, v. meditate, cogitate, ponder, contemplate, brood, reflect, muse, consider, speculate, ruminate, opine, deem, apprehend, excogitate, infer, surmise, mull.

thinkable, a. conceivable, cogitable, imaginable, presumable.

thinking, a. rational, pensive, reflective, contemplative, cogitative, introspective.

thinking, n. cogitation, meditation, contemplation, thought.

thinness, n. emaciation, slenderness, gauntness, spareness, meagerness; tenuity, delicacy, fineness; incompactness; rarity, subtilty, subtilization; inadequacy, sparseness, scantiness.

thinning, n. dilution, reduction, attenuation, rarefaction, subtilization.  Associated Words:  attenuant, diluent.

thin-skinned, a. leptodermic; sensitive, impressible, irritable.

third, a. tertiary.

thirst, n. dryness, aridity, drought.  Antonym:  adipsy.  Associated words:  slake, quench, dipsetic, adipsous.