- Definitions|2
- Thesaurus|248
- Abbreviations|0
17 entries under opening topic. ×
| peephole | |
| keyhole | |
| pinhole | |
| loophole | |
| hole(noun, break, channel, passage) | |
| pigeonhole | |
| eyelet | |
| mousehole | |
| outlet(noun, place, release, escape) | |
| vent(noun, break, channel, passage) | |
| aperture(noun, break, bow, channel) | |
| fontanel | |
| foramen | |
| perforation | |
| puncture | |
| slot | |
| transforation |
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| APA | Smart Define. (2015). porthole thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/porthole/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "porthole thesaurus" https://smartdefine.org/porthole/thesaurus/synonyms (accessed September 27, 2026). |
| Harvard | Smart Define 2015, porthole thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/porthole/thesaurus/synonyms>. |
| MLA | Smart Define. "porthole thesaurus" 10 April 2015. Web. 27 September 2026. <https://smartdefine.org/porthole/thesaurus/synonyms> |