Underground viaduct Synonyms

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

Definitions for Viaduct


  • (noun) bridge consisting of a series of arches supported by piers used to carry a road (or railroad) over a valley