two-timer vs betrayer

two-timer and betrayer both are nouns.

Word	Noun	Adjective	Verb	Adverb
two-timer	Yes	No	No	No
betrayer	Yes	No	No	No

As nouns, two-timer and betrayer are synonyms defined as:

Other synonyms of two-timer include double-crosser, double-dealer, traitor.

two-timer (noun)	betrayer (noun)
a person who says one thing and does another	a person who says one thing and does another
someone who deceives a lover or spouse by carrying on a sexual relationship with somebody else	one who reveals confidential information to the police or other authority