prune vs get rid of

prune is a noun but get rid of is not a noun.

Word	Noun	Adjective	Verb	Adverb
prune	Yes	No	Yes	No
get rid of	No	No	Yes	No

As verbs, get rid of is a hypernym of prune; that is, get rid of is a word with a broader meaning than prune:

Other hypernyms of prune include do away with, eliminate, extinguish.

prune (noun)	get rid of (noun)
dried plum

prune (verb)	get rid of (verb)
weed out unwanted or unnecessary things	terminate, end, or take out
cultivate, tend, and cut back the growth of	dispose of
	do away with