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Fifth columnist has 8 synonyms. The top synonyms for fifth columnist are crypto, fellow traveler, fifth column, fraternizer, saboteur, security risk, Trojan horse, underground. Browse the full list below.
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| Random | DefinitionA common synonym for fifth columnist is crypto. Other synonyms include fellow traveler, fifth column, fraternizer, saboteur.
Fifth columnist has 8 synonyms listed on Thesaurasize.
(n): a member of a clandestine subversive organization who tries to help a potential invader
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