rump vs croup

rump and croup both are nouns.

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

As nouns, rump and croup are synonyms defined as:

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

Other synonyms of rump include croupe, hindquarters.

rump (noun)	croup (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	a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing
fleshy hindquarters; behind the loin and above the round