cover-up vs cover up

cover-up is a noun but cover up is not a noun.

Word	Noun	Adjective	Verb	Adverb
cover-up	Yes	No	No	No
cover up	No	No	Yes	No

cover-up (noun)	cover up (noun)
concealment that attempts to prevent something scandalous from becoming public

cover-up (verb)	cover up (verb)
	hide from view or knowledge