Underground systems Synonyms

Underground replaced

Definitions for Underground


  • (adjective) undertaken or done so as to escape being observed or known by others
  • (adjective) being, situated, or operating beneath the surface of the earth
  • (noun) a secret organization in a conquered country fighting against enemy forces

Synonyms for phrase

US abbreviation

US is an abbreviation for Underground Systems
What does US stand for?
US stands for "Underground Systems"

Systems replaced