20 entries under concavity topic. ×

8
hollow(noun, space, hole, pocket, cavity)
6
cavity(noun, area, space, hole, hollow)
6
depression(noun, space, hole, hollow, pocket)
6
pit(noun, space, hole, hollow, pocket)
4
alveolus
4
follicle
4
lacuna
3
concavity
3
dent(noun, space, hole, hollow, pocket)
3
dip
2
dimple
2
dint
2
indentation
2
intaglio
2
trough
1
excavation
1
hollowness
1
honeycomb
0
furrow
0
strip mine(expression, idiom)
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APASmart Define. (2015). sinus thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/sinus/thesaurus/synonyms
ChicagoSmart Define. 2015. "sinus thesaurus" https://smartdefine.org/sinus/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, sinus thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/sinus/thesaurus/synonyms>.
MLASmart Define. "sinus thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/sinus/thesaurus/synonyms>