cinder vs clinker

cinder and clinker both are nouns.

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

As nouns, cinder and clinker are synonyms defined as:

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

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

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