Synonyms and related words :
alluvion, alluvium, ash, ashes, brand, burning ember, calx, carbon, charcoal, clinker, coal, coke, coom, deposition, deposits, diluvium, draff, dregs, dross, ember, feces, firebrand, froth, fume, grounds, lava, lees, live coal, loess, moraine, offscum, precipitate, precipitation, reek, scoria, scum, sediment, settlings, silt, sinter, slag, smoke, smudge, smut, soot, sublimate, sullage