| break | |
| consequential(adjective, substantial, useful) | |
| divorce(noun, break) | |
| loss(noun, break) | |
| meaningful(adjective, substantial, useful) | |
| necessary(adjective, substantial, useful) | |
| relevant(adjective, substantial, useful) | |
| serious(adjective, substantial, useful) | |
| significant(adjective, substantial, useful) | |
| substantial(adjective, useful) | |
| unbolt | |
| unbuckle | |
| unclasp | |
| undo | |
| unfasten | |
| unfold | |
| unhinge | |
| unzipper | |
| useful(adjective, substantial) | |
| valuable(adjective, substantial, useful) |
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| APA | Smart Define. (2015). zipper thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/zipper/thesaurus/antonyms |
| Chicago | Smart Define. 2015. "zipper thesaurus" https://smartdefine.org/zipper/thesaurus/antonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, zipper thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/zipper/thesaurus/antonyms>. |
| MLA | Smart Define. "zipper thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/zipper/thesaurus/antonyms> |