Cinder

Noun

 * 1) Partially or mostly burnt material that results from incomplete combustion of coal or wood etc.
 * 2) An ember.
 * 3) Slag from a metal furnace.

Derived terms

 * cinder block
 * cinder cone

Verb

 * 1)  to reduce something to cinders

Thesaurus
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