betrayer vs betray

betrayer is a noun but betray is not a noun.

Word	Noun	Adjective	Verb	Adverb
betrayer	Yes	No	No	No
betray	No	No	Yes	No

betrayer (noun)	betray (noun)
a person who says one thing and does another
one who reveals confidential information to the police or other authority

betrayer (verb)	betray (verb)
	give away information about somebody
	reveal unintentionally
	cause someone to believe an untruth
	disappoint, prove undependable to; abandon, forsake
	deliver to an enemy by treachery
	be sexually unfaithful to one's partner in marriage