dead body vs carrion

dead body and carrion both are nouns.

Word	Noun	Adjective	Verb	Adverb
dead body	Yes	No	No	No
carrion	Yes	No	No	No

As nouns, carrion is a hyponym of dead body; that is, carrion is a word with a more specific, narrower meaning than dead body:

Other hyponyms of dead body include kill, carcase, carcass, roadkill, cadaver, clay, corpse, remains, stiff, mummy.

dead body (noun)	carrion (noun)
a natural object consisting of a dead animal or person	the dead and rotting body of an animal; unfit for human food