disregard vs pass off

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

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

As verbs, pass off is a hyponym of disregard; that is, pass off is a word with a more specific, narrower meaning than disregard:

disregard (noun)	pass off (noun)
willful lack of care and attention
lack of attention and due care

disregard (verb)	pass off (verb)
give little or no attention to	expel (gases or odors)
bar from attention or consideration	come to pass
refuse to acknowledge	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