roll down vs go down

roll down and go down both are verbs.

Word	Noun	Adjective	Verb	Adverb
roll down	No	No	Yes	No
go down	No	No	Yes	No

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

Other hypernyms of roll down include come down, descend, fall.

roll down (verb)	go down (verb)
gather into a huge mass and roll down a mountain, of snow	grow smaller
	stop operating
	be defeated
	be ingested
	go under
	disappear beyond the horizon
	move downward and lower, but not necessarily all the way
	be recorded or remembered