prolapse vs descend

prolapse is a noun but descend is not a noun.

Word	Noun	Adjective	Verb	Adverb
prolapse	Yes	No	Yes	No
descend	No	No	Yes	No

As verbs, descend is a hypernym of prolapse; that is, descend is a word with a broader meaning than prolapse:

Other hypernyms of prolapse include come down, fall, go down.

prolapse (noun)	descend (noun)
the slipping or falling out of place of an organ (as the uterus)

prolapse (verb)	descend (verb)
slip or fall out of place, as of body parts	come as if by falling
	move downward and lower, but not necessarily all the way
	do something that one considers to be below one's dignity
	come from; be connected by a relationship of blood, for example