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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. Another word for fifth columnist is crypto. 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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