| eyelet(noun, break, cut, crack, opening) | |
| mousehole(noun, opening) | |
| peephole(noun, opening) | |
| hole(noun, opening, dump, shack, slum) | |
| loophole(noun, opening) | |
| pigeonhole(noun, opening) | |
| pinhole(noun, opening) | |
| porthole(noun, opening) | |
| vent(noun, break, cut, crack, opening) | |
| armhole | |
| dimple(noun, break, cut, crack, opening) | |
| foramen(noun, break, cut, crack, opening) | |
| free throw line(noun, expression, idiom, line) | |
| knothole | |
| loop | |
| niche(noun, break, cut, crack, opening) | |
| air hole | |
| aperture(noun, break, cut, crack, opening) | |
| blowhole | |
| bolt |
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| APA | Smart Define. (2015). keyhole thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/keyhole/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "keyhole thesaurus" https://smartdefine.org/keyhole/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, keyhole thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/keyhole/thesaurus/synonyms>. |
| MLA | Smart Define. "keyhole thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/keyhole/thesaurus/synonyms> |