fade vs pass off

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

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

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

Other synonyms of fade include blow over, evanesce, fleet, pass.

fade (noun)	pass off (noun)
gradually ceasing to be visible
a golf shot that curves to the right for a right-handed golfer

fade (verb)	pass off (verb)
become feeble	expel (gases or odors)
disappear gradually	come to pass
lose freshness, vigor, or vitality	disappear gradually
become less clearly visible or distinguishable; disappear gradually or seemingly	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