Betrayers, noun plural of betrayer. Synonyms in the same form.
Traitor
traitors, double-dealers, renegades, double-crossers, serpents, snakes, two-timers, judases, quislings, treasonists, backstabbers, recreants, cockatrices, renegaders
Rat
rats, informers, blabbers, squealers
Other
seducers, finks
All synonyms for betrayer →