Synonyms and related words :
clarifier, colander, cradle, cribble, cribriformity, cribrosity, filter, honeycomb, lixiviator, net, percolator, porosity, porousness, purifier, refiner, refinery, riddle, rocker, screen, sieve, sievelikeness, sifter, sponge, winnow, winnowing basket, winnowing fan, winnowing machine