Synonyms of stale

1 Syllable
hard, parch, weak, sour, worn, drier, driest, drying, dried, flat, rank, scorch, dry
2 Syllables
prosaic, yawner, parching, rainless, staling, choky, stagnant, banal, shrivel, parches, wizen, stinking, ho-hum, curdled, castoff, reeking, fusty, olid, mummy, carious, moldier, tired, corny, rotten, scentful, skunky, starcher, mummies, hohum, fecal, washier, fetid, moldy, musty, boring, old-hat, olden, zestless, spoiled, stenchy, airless, cornfed, chokier, stuffy, rancid, proser, rusted, has-been, old-school, worn-out, scorched, parched, aging, stuffiest, ranker, mustier, corniest, cornier, prosy, smelly, rankest, old-saw, prosier, unclean, staled, frowstier, stuffier, vapid, mummied, faded, triper, triter, common, washy, whiffy, tritest, shrivels, time-worn, cast-off, hokey, shopworn, hackneyed
3 Syllables
insipid, bromidic, mildewed, shrivelling, unaired, savorless, dinosaur, feculent, putrescent, strong-smelling, bad-smelling, putrified, savorous, scent-laden, tumaceous, demode, noisome, commonest, effluvious, odorous, perfumy, sweet-scented, noplace, pustular, disused, desiccant, shriveled, shriveling, shrivelled, old-chestnut, torrefy, tasteless, watery, purulent, mildewy
4 Syllables
commonplace, stereotypic, warmed-over, unmoistened, stereotyped, obsolete, overused, evil-smelling, malodorous, olfactive, dime-a-dozen, milk-and-water, mass-produced, uninspired, narcoleptic, moistureless, out-of-fashion, readymade, olfactory, unenjoyable, overripe, characterless
5 Syllables
stereotypical, platitudinal, unventilated, putrefactive, unpleasurable, platitudinous, uninteresting, anachronistic, unentertaining, unmotivated