avalanche vs come down

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

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

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

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

avalanche (noun)	come down (noun)
a slide of large masses of snow and ice and mud down a mountain
a sudden appearance of an overwhelming number of things

avalanche (verb)	come down (verb)
gather into a huge mass and roll down a mountain, of snow	get sick
	be the essential element
	criticize or reprimand harshly
	move downward and lower, but not necessarily all the way
	fall from clouds