4
concave shape(noun, expression, idiom)
4
sag(noun, drop, decline, fall, sink)
4
sinkhole(noun, drop, decline, fall, depression)
4
trough
3
alveolus
3
cup
3
follicle
3
lacuna
3
recess(noun, receptacle)
3
scoop(noun, depression, impression, dip, hollow)
3
sink(noun, drop, decline, fall, depression)
2
circumference(bend, bow, loop, arch, arc)
2
crypt
2
curvation(bend, bow, loop, arch, arc)
2
curvature(bend, bow, loop, arch, arc)
2
excavation(noun, depression, impression, dip, hollow)
2
imprint
2
indent(noun, impression, dip, hollow)
2
indenture
2
notch
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APASmart Define. (2015). concavity thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/concavity/thesaurus/synonyms
ChicagoSmart Define. 2015. "concavity thesaurus" https://smartdefine.org/concavity/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, concavity thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/concavity/thesaurus/synonyms>.
MLASmart Define. "concavity thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/concavity/thesaurus/synonyms>