We found 2 definitions of treasonist from 2 different sources.
Noun |
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treasonist - someone who betrays his country by committing treason | ||
traitor | ||
criminal, malefactor, outlaw, felon, crook someone who has committed a crime or has been legally convicted of a crime | ||
collaborationist, quisling, collaborator an associate in an activity or endeavor or sphere of common interest; "the musician and the librettist were collaborators"; "sexual partners" | ||
fifth columnist, saboteur a member of a clandestine subversive organization who tries to help a potential invader | ||
traitress female traitor |