carcase vs carcass

carcase and carcass both are nouns.

Word	Noun	Adjective	Verb	Adverb
carcase	Yes	No	No	No
carcass	Yes	No	No	No

As nouns, carcase and carcass are synonyms defined as:

carcase and carcass: the dead body of an animal especially one slaughtered and dressed for food

carcase (noun)	carcass (noun)
the dead body of an animal especially one slaughtered and dressed for food	the dead body of an animal especially one slaughtered and dressed for food