rump vs croupe

rump and croupe both are nouns.

Word	Noun	Adjective	Verb	Adverb
rump	Yes	No	No	No
croupe	Yes	No	No	No

As nouns, rump and croupe are synonyms defined as:

rump and croupe: the part of an animal that corresponds to the human buttocks

Other synonyms of rump include croup, hindquarters.

rump (noun)	croupe (noun)
the part of an animal that corresponds to the human buttocks	the part of an animal that corresponds to the human buttocks
the fleshy part of the human body that you sit on
fleshy hindquarters; behind the loin and above the round