air, attritus, badness, bran, contamination, cosmic dust, crumb, crumble, dust, dust ball, efflorescence, fallout, farina, filings, flour, grits, groats, harmfulness, health hazard, injuriousness, insalubriousness, insalubrity, kittens, lint, meal, menace to health, noise pollution, noisomeness, noxiousness, pathenogenicity, pollution, powder, pussies, raspings, sawdust, smut, soot, unhealthfulness, unhealthiness, unsalutariness, unwholesomeness, water