betrayer vs squealer

betrayer and squealer both are nouns.

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

As nouns, betrayer and squealer are synonyms defined as:

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

Other synonyms of betrayer include blabber, informer, rat.

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