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Fifth columnist has 8 synonyms. The top synonyms for fifth columnist are underground, Trojan horse, security risk, saboteur, fraternizer, fifth column, fellow traveler, crypto. Another word for fifth columnist is underground. Browse the full list below.
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| Random | DefinitionA common synonym for fifth columnist is underground. Other synonyms include Trojan horse, security risk, saboteur, fraternizer.
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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