Thesaurus

Synonyms for Old include:

abloom, above, above-mentioned, above-named, acquainted, acquainted with, addled, adult, age-old, aged, ageing, aging, ago, agone, ancient, anile, antebellum, antecedent, antediluvian, antiquated, antique, archaic, attested, attrited, auld, authentic, authenticated, back, bad, battered, beaten, big, bona fide, bygone, bypast, centenarian, chivalric, clapped out, cold, creaky, darkened, dated, day-old, dead, decrepit, demode, departed, derelict, disused, documented, doddering, doddery, dog-eared, dowdy, eared, early, echt, efflorescent, elder, elderly, emeritus, eroded, erstwhile, ex, existent, experienced, experient, familiar, familiar with, flea-bitten, flyblown, fogyish, foregoing, foregone, former, frayed, fruiting, frumpish, frumpy, full-blown, full-fledged, full-grown, fully fledged, fully grown, gaga, genuine, gone, good, gothic, gray, gray-haired, gray-headed, grey, grey-haired, grey-headed, grizzly, grown, grownup, hand-down, hand-me-down, hard, headed, higher-ranking, historic, historical, hoar, hoary, honest, honest-to-god, honest-to-goodness, honorable, horse-and-buggy, immemorial, intimate, introductory, knightly, knowledgeable, known, last, late, limp, long-ago, long-familiar, longtime, maggoty, major, mangey, mangy, marriageable, mature, matured, mediaeval, medieval, meridian, middle-aged, moldy, moss-grown, mossy, moth-eaten, mothy, mouldy, musty, nonagenarian, noncurrent, nonmodern, nubile, obsolescent, obsolete, octogenarian, of age, old, old-fashioned, old-hat, old-world, olden, older, oldish, onetime, other, out, out-of-date, outdated, outgoing, outmoded, over-the-hill, overage, overaged, overblown, passe, passee, past, patched, played out, practiced, practised, precedent, precedential, preceding, prefatorial, prefatory, prehistoric, prehistorical, premedical, preparative, preparatory, previous, prime, propaedeutic, quondam, raddled, ragged, rancid, ranking, ratty, real, recent, retired, run-down, rusty, scoured, scruffy, seasoned, secondhand, seedy, senescent, senile, senior, sexagenarian, shabby, shopsoiled, shopworn, sincere, skilled, sometime, spoiled, spoilt, sr., stale, stick-in-the-mud, stodgy, sunset, superannuated, superior, sure-enough, tatterdemalion, tattered, tatty, then, threadbare, thumbed, tough, toughened, true, ult, ultimo, unfashionable, unoriginal, unquestionable, unstylish, used, venerable, veritable, vermiculate, versed, veteran, Victorian, waterworn, weather-beaten, weathered, weatherworn, well-known, well-worn, white-haired, wilted, woebegone, worm-eaten, wormy, worn, worn-out, yellow, yellowed

old is a ADJ.