go off vs pass off

go off and pass off both are verbs.

Word	Noun	Adjective	Verb	Adverb
go off	No	No	Yes	No
pass off	No	No	Yes	No

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

Other hypernyms of go off include come about, fall out, go on, hap, happen, occur, pass, take place.

go off (verb)	pass off (verb)
be discharged or activated	expel (gases or odors)
happen in a particular manner	come to pass
burst inward	disappear gradually
go off or discharge	disregard
stop running, functioning, or operating	cause to be circulated and accepted in a false character or identity
run away; usually includes taking something or somebody along	be accepted as something or somebody in a false character or identity