10 entries under hollow topic. ×

19
hole(noun, opening, cave)
18
cave(noun, retreat, dip, hole)
8
grotto(noun, concavity, cave, convex)
5
den(noun, retreat, dip, hole)
2
pothole
1
cavity
1
subterrane
1
fissure
1
subterranean area(noun, expression)
0
rock shelter(noun, expression)
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APASmart Define. (2015). cavern thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/cavern/thesaurus/synonyms
ChicagoSmart Define. 2015. "cavern thesaurus" https://smartdefine.org/cavern/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, cavern thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/cavern/thesaurus/synonyms>.
MLASmart Define. "cavern thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/cavern/thesaurus/synonyms>