winnow, aerate, air, air out, air-cool, airify, analyze, appraise, assess, bolt, catalog, categorize, choose out, clarifier, clarify, class, classify, clear, colander, comb , contradistinguish, cordon, cordon off, cradle, cribble, cross-ventilate, cull, cull out, decide between, decrassify, demarcate, demark, depurate, differentiate, discriminate, distill, distinguish, divide, draw the line, edulcorate, elute, essentialize, evaluate, excerpt, extract, factor, fan, filter, filtrate, freshen, gauge, ghettoize, gin, glean, group, handpick, identify, insulate, isolate, keep apart, keep aside, lay aside, leach, lixiviate, lixiviator, make a selection, mark the interface, oxygenate, oxygenize, percolate, percolator, pick, pick out, purifier, purify, put aside, quarantine, rectify, refine, refiner, refinery, refresh, riddle, rocker, ruffle, screen, screen out, seclude, segregate, select, separate, set a limit, set apart, set aside, set off, sever, severalize, sieve, sieve out, sift , sift out, sifter, single out, sort, sort out, spiritualize, split hairs, strain, strainer, subdivide, sublimate, sublime, subtilize, thrash, thrash out, thresh, try, ventilate, weigh, wind, winnowing basket, winnowing fan, winnowing machine