n. 25B6; noun COLLABORATOR, fraternizer, colluder, sympathizer; traitor, turncoat, back-stabber, double-crosser, defector, Judas, snake in the grass, fifth columnist.
QUISLING
Meaning of QUISLING in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012