go off vs cave in

go off is not a noun while cave in is a noun.

Word	Noun	Adjective	Verb	Adverb
go off	No	No	Yes	No
cave in	Yes	No	Yes	No

As verbs, cave in is a hypernym of go off; that is, cave in is a word with a broader meaning than go off:

Other hypernyms of go off include break, collapse, fall in, founder, give, give way.

go off (noun)	cave in (noun)
	the sudden collapse of something into a hollow beneath it

go off (verb)	cave in (verb)
be discharged or activated	break down, literally or metaphorically
happen in a particular manner
burst inward
go off or discharge
stop running, functioning, or operating
run away; usually includes taking something or somebody along