betrayer vs blabber

betrayer and blabber both are nouns.

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

As nouns, betrayer and blabber are synonyms defined as:

betrayer and blabber: one who reveals confidential information to the police or other authority

Other synonyms of betrayer include informer, rat, squealer.

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

betrayer (verb)	blabber (verb)
	speak (about unimportant matters) rapidly and incessantly