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sub terrestrial

see definition of sub terrestrial
  • as insubterranean
  • as inunderground
  • as inhypogeal
  • as inhypogean
  • as inhypogeous
  • as insubterrestrial
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Synonyms for sub terrestrial

adj hidden, underground
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.