Synonyms|88Antonyms|5|Broader|2Narrower|0Related|0

6 entries under underground topic. ×

5
Trojan horse(noun, expression, secret)
3
saboteurs(noun, opposition, agent, secret, criminal)
3
subversives(noun, secret, subway)
2
collaborators(noun, secret)
2
collaborators of enemy(noun, expression, idiom, secret)
2
infiltrators(noun, secret, subversives)
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APASmart Define. (2015). fifth column thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/fifth_column/thesaurus/synonyms
ChicagoSmart Define. 2015. "fifth column thesaurus" https://smartdefine.org/fifth_column/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, fifth column thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/fifth_column/thesaurus/synonyms>.
MLASmart Define. "fifth column thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/fifth_column/thesaurus/synonyms>