49 entries under noun topic. ×
| hollow(space, hole, pocket, cavity) | |
| cavity(area, space, hole, hollow) | |
| depression(space, hole, hollow, pocket) | |
| hole(space, hollow, pocket, crater) | |
| pit(space, hole, hollow, pocket) | |
| antrum | |
| fistula | |
| alveolus | |
| follicle | |
| lacuna | |
| recess | |
| bow | |
| circle | |
| crook | |
| curve | |
| dent(space, hole, hollow, pocket) | |
| opening(space, hole, hollow, cavity) | |
| parabola | |
| pocket(space, hole, hollow, cavity) | |
| venous sinus(expression, idiom) |
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| APA | Smart Define. (2015). sinus thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/sinus/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sinus thesaurus" https://smartdefine.org/sinus/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, sinus thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/sinus/thesaurus/synonyms>. |
| MLA | Smart Define. "sinus thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/sinus/thesaurus/synonyms> |