pass off vs vanish

pass off and vanish both are verbs.

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

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

Other hypernyms of pass off include disappear, go away.

pass off (verb)	vanish (verb)
expel (gases or odors)	get lost, as without warning or explanation
come to pass	decrease rapidly and disappear
disappear gradually	cease to exist
disregard	pass away rapidly
cause to be circulated and accepted in a false character or identity	become invisible or unnoticeable
be accepted as something or somebody in a false character or identity