11 entries under depth topic. ×

32
underground(adjective, surface)
14
subterraneous
13
buried(adjective, hidden, underground, covered)
8
deep(adjective, low, down, far)
5
submarine
5
subaqueous
2
profound(adjective, bottomless)
2
submerged
2
subterrene
1
deep seated(expression, idiom)
0
sunk
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APASmart Define. (2015). subterranean thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/subterranean/thesaurus/synonyms
ChicagoSmart Define. 2015. "subterranean thesaurus" https://smartdefine.org/subterranean/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, subterranean thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/subterranean/thesaurus/synonyms>.
MLASmart Define. "subterranean thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/subterranean/thesaurus/synonyms>