Synonyms|190Antonyms|52|Broader|1Narrower|0Related|490

4 entries under underground topic. ×

2
subterranean(adjective, hidden)
0
hypogeal
0
hypogean
0
hypogeous
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APASmart Define. (2015). sunken thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sunken/thesaurus/synonyms
ChicagoSmart Define. 2015. "sunken thesaurus" https://smartdefine.org/sunken/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, sunken thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sunken/thesaurus/synonyms>.
MLASmart Define. "sunken thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/sunken/thesaurus/synonyms>