pass off vs expel

pass off and expel both are verbs.

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

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

Other hypernyms of pass off include discharge, eject, exhaust, release.

pass off (verb)	expel (verb)
expel (gases or odors)	eliminate (a substance)
come to pass	cause to flee
disappear gradually	force to leave or move out
disregard	remove from a position or office
cause to be circulated and accepted in a false character or identity
be accepted as something or somebody in a false character or identity