betrayer

As nouns the difference between collaborator and betrayer

is that collaborator is a person who works with others towards a common goal while betrayer is someone who betrays, or reveals confidential information; a squealer or informer.

As nouns the difference between betrayer and backstabber

is that betrayer is someone who betrays, or reveals confidential information; a squealer or informer while backstabber is a traitor or hypocrite, such as a co-worker or friend assumed trustworthy but who figuratively attacks when one's back is turned.

As a noun betrayer

is someone who betrays, or reveals confidential information; a squealer or informer.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between snitch and betrayer

is that snitch is a thief while betrayer is someone who betrays, or reveals confidential information; a squealer or informer.

As a verb snitch

is to steal, quickly and quietly.

As nouns the difference between tattletale and betrayer

is that tattletale is one who tattles (reports others' wrongdoings), often by a child seeking attention while betrayer is someone who betrays, or reveals confidential information; a squealer or informer.

As an adjective tattletale

is telltale, giveaway.

As nouns the difference between defector and betrayer

is that defector is one who defects while betrayer is someone who betrays, or reveals confidential information; a squealer or informer.

As nouns the difference between betrayer and impostor

is that betrayer is someone who betrays, or reveals confidential information; a squealer or informer while impostor is someone who attempts to deceive by using an assumed name or identity.

As nouns the difference between betrayer and imposter

is that betrayer is someone who betrays, or reveals confidential information; a squealer or informer while imposter is someone who attempts to deceive by using an assumed name or identity or other devious disguise.

As nouns the difference between dog and betrayer

is that dog is a mammal, canis lupus familiaris , that has been domesticated for thousands of years, of highly variable appearance due to human breeding while betrayer is someone who betrays, or reveals confidential information; a squealer or informer.

As a verb dog

is to pursue with the intent to catch.

As nouns the difference between cheater and betrayer

is that cheater is one who cheats while betrayer is someone who betrays, or reveals confidential information; a squealer or informer.