rappel vs come down

rappel is a noun but come down is not a noun.

Word	Noun	Adjective	Verb	Adverb
rappel	Yes	No	Yes	No
come down	No	No	Yes	No

As verbs, come down is a hypernym of rappel; that is, come down is a word with a broader meaning than rappel:

Other hypernyms of rappel include descend, fall, go down.

rappel (noun)	come down (noun)
(mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body

rappel (verb)	come down (verb)
descend by means of a rappel	get sick
	be the essential element
	criticize or reprimand harshly
	move downward and lower, but not necessarily all the way
	fall from clouds