happen vs pass off

happen and pass off both are verbs.

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

As verbs, happen and pass off are synonyms defined as:

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

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

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

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

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

happen (verb)	pass off (verb)
come to pass	expel (gases or odors)
come into being; become reality	come to pass
happen, occur, or be the case in the course of events or by chance	disappear gradually
come upon, as if by accident; meet with	disregard
chance to be or do something, without intention or causation	cause to be circulated and accepted in a false character or identity
	be accepted as something or somebody in a false character or identity