treasonist

Synonyms:

traitor

Examples:

Benedict Arnold

United States general and traitor in the American Revolution; in 1780 his plan to surrender West Point to the British was foiled (1741-1801)

Types:

collaborationist, collaborator, quisling

someone who collaborates with an enemy occupying force

fifth columnist, saboteur

a member of a clandestine subversive organization who tries to help a potential invader

traitress

female traitor

Type of:

criminal, crook, felon, malefactor, outlaw

someone who has committed a crime or has been legally convicted of a crime