Underground ocean 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

UO abbreviation

UO is an abbreviation for Underground Ocean
What does UO stand for?
UO stands for "Underground Ocean"

Ocean replaced

Definitions for Ocean


  • (noun) the whole body of salt water that covers nearly three-fourths of the earth
  • (noun) an immeasurable depth or space
  • (noun) a large body of water constituting a principal part of the hydrosphere