FIFTH COLUMN as NOUN

1. Meaning
   • a subversive group that supports the enemy and engages in espionage or sabotage
   • an enemy in your midst
   
   Synonym(s)
   • Trojan horse (what does Trojan horse mean?)
   
   Hypernyms(s) fifth column is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
   • unit (what does unit mean?)
   • social unit (what does social unit mean?)