rump vs haunch

rump and haunch both are nouns.

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

As nouns, haunch is a hyponym of rump; that is, haunch is a word with a more specific, narrower meaning than rump:

rump (noun)	haunch (noun)
the part of an animal that corresponds to the human buttocks	the loin and leg of a quadruped
the fleshy part of the human body that you sit on	the hip and buttock and upper thigh in human beings
fleshy hindquarters; behind the loin and above the round