clinker vs cinder

clinker and cinder both are nouns.

Word	Noun	Adjective	Verb	Adverb
clinker	Yes	No	Yes	No
cinder	Yes	No	No	No

As nouns, clinker and cinder are synonyms defined as:

clinker and cinder: a fragment of incombustible matter left after a wood or coal or charcoal fire

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

clinker (verb)	cinder (verb)
turn to clinker or form clinker under excessive heat in burning
clear out the cinders and clinker from