Judas and Two-timer

Judas noun - Someone who betrays under the guise of friendship.

Two-timer and judas are semantically related in traitor topic. In some cases you can use "Two-timer" instead a noun "Judas".

Two-timer noun - Someone who deceives a lover or spouse by carrying on a sexual relationship with somebody else.

Judas and two-timer are semantically related in traitor topic. You can use "Judas" instead a noun phrase "Two-timer", if it concerns topics such as person who is disloyal.