crackling vs greaves

crackling and greaves both are nouns.

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

As nouns, crackling and greaves are synonyms defined as:

crackling and greaves: the residue that remains after animal fat has been rendered

crackling (noun)	greaves (noun)
the sharp sound of snapping noises	the residue that remains after animal fat has been rendered
the residue that remains after animal fat has been rendered