Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun fifth_column

1 sense of fifth column

Sense 1
fifth column, Trojan horse -- (a subversive group that supports the enemy and engages in espionage or sabotage; an enemy in your midst)
       => unit, social unit -- (an organization regarded as part of a larger social group; "the coach said the offensive unit did a good job"; "after the battle the soldier had trouble rejoining his unit")