Synonyms|39Antonyms|4|Broader|0Narrower|5Related|78
7
subterranean(adjective, depth)
6
underground(adjective, depth)
4
buried
4
ulterior
3
submarine(noun, depth)
2
secret
2
subaqueous(adjective, depth)
2
submerged
1
hidden
1
hypogeal
1
profound
1
secretiveness
1
subterrene
1
undercover
0
deep
0
cabinet
0
cable
0
covert
0
cryptic
0
deep seated(expression, idiom, depth)
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APASmart Define. (2015). subterraneous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/subterraneous/thesaurus/synonyms
ChicagoSmart Define. 2015. "subterraneous thesaurus" https://smartdefine.org/subterraneous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, subterraneous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/subterraneous/thesaurus/synonyms>.
MLASmart Define. "subterraneous thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/subterraneous/thesaurus/synonyms>