residue vs greaves

residue and greaves both are nouns.

Word	Noun	Adjective	Verb	Adverb
residue	Yes	No	No	No
greaves	Yes	No	No	No

As nouns, greaves is a hyponym of residue; that is, greaves is a word with a more specific, narrower meaning than residue:

Other hyponyms of residue include crackling, ash, cotton cake, cottonseed cake, dottle, brewer's grain, draff, spent grain.

residue (noun)	greaves (noun)
something left after other parts have been taken away	the residue that remains after animal fat has been rendered
matter that remains after something has been removed