croup vs hindquarters

croup and hindquarters both are nouns.

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

As nouns, croup and hindquarters are synonyms defined as:

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

Other synonyms of croup include croupe, rump.

croup (noun)	hindquarters (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