Nouns

(n)cinder, clinkera fragment of incombustible matter left after a wood or coal or charcoal fire
(n)clinker, clinker bricka hard brick used as a paving stone

Verbs

(v)clinkerclear out the cinders and clinker from“we clinkered the fire frequently”
(v)clinkerturn to clinker or form clinker under excessive heat in burning