5
eyelet(noun, break, cut, crack, opening)
4
mousehole(noun, opening)
4
peephole(noun, opening)
3
hole(noun, opening, dump, shack, slum)
3
loophole(noun, opening)
3
pigeonhole(noun, opening)
3
pinhole(noun, opening)
3
porthole(noun, opening)
3
vent(noun, break, cut, crack, opening)
2
armhole
2
dimple(noun, break, cut, crack, opening)
2
foramen(noun, break, cut, crack, opening)
2
free throw line(noun, expression, idiom, line)
2
knothole
2
loop
2
niche(noun, break, cut, crack, opening)
1
air hole
1
aperture(noun, break, cut, crack, opening)
1
blowhole
1
bolt
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APASmart Define. (2015). keyhole thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/keyhole/thesaurus/synonyms
ChicagoSmart Define. 2015. "keyhole thesaurus" https://smartdefine.org/keyhole/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, keyhole thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/keyhole/thesaurus/synonyms>.
MLASmart Define. "keyhole thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/keyhole/thesaurus/synonyms>