Underground reactor 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

UR abbreviation

UR is an abbreviation for Underground Reactor
What does UR stand for?
UR stands for "Underground Reactor"

Reactor replaced

Definitions for Reactor


  • (noun) (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
  • (noun) an electrical device used to introduce reactance into a circuit