THESAURUS
Astringent
Spartan, Spartanic, acerb, acerbic, acid, acidulous, acrid, acrimonious, alum, amaroidal, ascetic, asperous, austere, authoritarian, biting, bitter, bitter as gall, brisk, caustic, clamp, coarse, collapsible, compactable, compressible, compressor, constrictor, constringent, consumptive, contractible, contractile, contractional, contractive, contractor, cutting, deflationary, demanding, double-edged, dour, edged, escharotic, exacting, exigent, fierce, foldable, grim, hard, harsh, incisive, inclement, irritating, keen, meticulous, mordacious, mordant, mortified, nose-tickling, penetrating, piercing, pincer, piquant, poignant, puckery, pungent, restorative, rigorous, roborant, rough, rugged, scathing, severe, sharp, sour, stabbing, stern, stinging, strict, strident, stringent, styptic, styptic pencil, tart, tough, trenchant, ungentle, unsparing, vehement, violent, virulent, vise, vitriolic
ROGET THESAURUS
Astringent
Contraction
N
contraction, reduction, diminution, decrease of size, defalcation, decrement, lessening, shrinking, compaction, tabes, collapse, emaciation, attenuation, tabefaction, consumption, marasmus, atrophy, systole, neck, hourglass, condensation, compression, compactness, compendium, squeezing, strangulation, corrugation, astringency, astringents, sclerotics, contractility, compressibility, coarctation, inferiority in size, contracting, astringent, shrunk, contracted, strangulated, tabid, wizened, stunted, waning, neap, compact, unexpanded &c (expand), contractile, compressible, smaller &c (small).
Acridity
N
acridity, astringency, bite, tear gas, smoke, acrid fumes, acrid, biting, astringent, sharp, harsh, bitter, (5) Sound (i) SOUND IN GENERAL.