Underground reservoir 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 Reservoir


  • (noun) the number of individuals or amount of something available at any given time
  • (noun) lake used to store water for community use
  • (noun) tank used for collecting and storing a liquid (as water or oil)