Trojan horse vs fifth column

Trojan horse and fifth column both are nouns.

Word	Noun	Adjective	Verb	Adverb
Trojan horse	Yes	No	No	No
fifth column	Yes	No	No	No

As nouns, Trojan horse and fifth column are synonyms defined as:

Trojan horse and fifth column: a subversive group that supports the enemy and engages in espionage or sabotage; an enemy in your midst

Trojan horse (noun)	fifth column (noun)
a subversive group that supports the enemy and engages in espionage or sabotage; an enemy in your midst	a subversive group that supports the enemy and engages in espionage or sabotage; an enemy in your midst