hindquarters vs croup

hindquarters and croup both are nouns.

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

As nouns, hindquarters and croup are synonyms defined as:

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

Other synonyms of hindquarters include croupe, rump.

hindquarters (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