croup vs rump

croup and rump both are nouns.

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

As nouns, croup and rump are synonyms defined as:

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

Other synonyms of croup include croupe, hindquarters.

croup (noun)	rump (noun)
the part of an animal that corresponds to the human buttocks	the part of an animal that corresponds to the human buttocks
a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing	the fleshy part of the human body that you sit on
	fleshy hindquarters; behind the loin and above the round