WordNet sense 1 (immune to attack; impregnable):

invulnerable

WordNet sense 2 (pulled or drawn tight):

taut

WordNet sense 3 (taut or rigid; stretched tight):

tense

WordNet sense 4 (of textures that are smooth to the touch or substances consisting of relatively small particles):

fine, fine

WordNet sense 5 (not likely to fail or give way):

secure

WordNet sense 6 (pressed tightly together):

compressed

WordNet sense 7 (used especially of mouth or eyes):

closed, shut

WordNet sense 8 (fitting snugly):

skinny

WordNet sense 9 (fitting closely but comfortably):

close, close-fitting, snug

WordNet sense 10 ((used of persons or behavior) characterized by or indicative of lack of generosity):

mean, miserly, mingy

WordNet sense 11 (unwilling to spend):

ungenerous

WordNet sense 12 (well matched; having the same quantity, value, or measure as another):

equal

WordNet sense 13 (very drunk):

besotted, cockeyed, crocked, loaded, pie-eyed, pissed, plastered, potty, sloshed, smashed, soused, stiff, tipsy, wet, pixilated, blotto, fuddled, slopped, soaked, sozzled, squiffy, tiddley, tiddly, blind drunk

WordNet sense 14 (stupefied or excited by a chemical substance (especially alcohol)):

drunk, inebriated

WordNet sense 15 (exasperatingly difficult to handle or circumvent):

nasty

WordNet sense 16 (not easy; requiring great physical or mental effort to accomplish or comprehend or endure):

difficult, hard

WordNet sense 17 (demanding strict attention to rules and procedures):

rigorous, stringent

WordNet sense 18 (requiring more than usually expected or thought due; especially great patience and effort and skill):

demanding

WordNet sense 19 (closely and firmly united or packed together):

compact, compact

WordNet sense 20 (in an attentive manner):

closely

WordNet sense 21 (firmly or tightly):

fast

WordNet sense 22 (deficient in quantity or number compared with the demand):

scarce