threaten vs menace

threaten is not a noun while menace is a noun.

Word	Noun	Adjective	Verb	Adverb
threaten	No	No	Yes	No
menace	Yes	No	Yes	No

As verbs, threaten and menace are synonyms defined as:

Other synonyms of threaten include endanger, imperil, jeopardise, jeopardize, peril.

threaten (noun)	menace (noun)
	a threat or the act of threatening
	something that is a source of danger

threaten (verb)	menace (verb)
to utter intentions of injury or punishment against	act in a threatening manner
to be a menacing indication of something	express a threat either by an utterance or a gesture
pose a threat to; present a danger to	pose a threat to; present a danger to