Synonyms|135Antonyms|1|Broader|9Narrower|19Related|36
8
hollow(noun, space, hole, pocket, cavity)
6
cavity(noun, area, space, hole, hollow)
6
depression(noun, space, hole, hollow, pocket)
6
hole(noun, space, hollow, pocket, crater)
6
pit(noun, space, hole, hollow, pocket)
5
antrum(noun, cavity)
5
fistula
4
alveolus(noun, concavity)
4
follicle(noun, concavity)
4
lacuna(noun, concavity)
4
recess(noun, cavity)
3
bow(noun, curve)
3
circle(noun, curve)
3
concavity
3
crook(noun, curve)
3
curve(noun, curve)
3
dent(noun, space, hole, hollow, pocket)
3
dip
3
opening(noun, space, hole, hollow, cavity)
3
parabola(noun, curve)
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APASmart Define. (2015). Sinus thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sinus/thesaurus/synonyms
ChicagoSmart Define. 2015. "Sinus thesaurus" https://smartdefine.org/sinus/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, Sinus thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sinus/thesaurus/synonyms>.
MLASmart Define. "Sinus thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/sinus/thesaurus/synonyms>