Definitions from Wiktionary (fifth columnism)
▸ noun: The activities of the fifth column, secretly undermining another organization.
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▸ noun: The activities of the fifth column, secretly undermining another organization.
Similar:
front organization,
countersubversion,
counterintelligence,
Fifth Monarchism,
counterrevolutionaryism,
conspiratorialism,
Five Poisons,
counterespionage,
covertism,
underground,
more...
Opposite:
▸ Words similar to fifth columnism
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▸ Idioms related to fifth columnism
▸ Wikipedia articles (New!)
▸ Words that often appear near fifth columnism
▸ Rhymes of fifth columnism
▸ Invented words related to fifth columnism