effect vs pass off

effect is a noun but pass off is not a noun.

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

effect (noun)	pass off (noun)
an outward appearance
(of a law) having legal validity
an impression (especially one that is artificial or contrived)
the central meaning or theme of a speech or literary work
a phenomenon that follows and is caused by some previous phenomenon
a symptom caused by an illness or a drug

effect (verb)	pass off (verb)
produce	expel (gases or odors)
act so as to bring into existence	come to pass
	disappear gradually
	disregard
	cause to be circulated and accepted in a false character or identity
	be accepted as something or somebody in a false character or identity