| concluding(adjective, sympathetic, broken, finished, occasional) | |
| desultory | |
| episodic | |
| fleeting | |
| flexible | |
| inconsistent(adjective, certain) | |
| infrequent(adjective, sympathetic, broken, finished, frequent) | |
| interrupted(verb, adjective, sympathetic, broken, finished) | |
| mercurial(certain, sure) | |
| perfidious | |
| periodic | |
| sporadic(adjective, off) | |
| stopping(verb, adjective, sympathetic, broken, finished) | |
| temperamental(calm, happy) | |
| terminable(adjective, sympathetic, broken, finished, occasional) | |
| transient(adjective, sympathetic, broken, finished, occasional) | |
| uncertain | |
| undecided(adjective, sympathetic, broken, finished, occasional) | |
| unfaithful | |
| unreliable(adjective, clear, strong, dependable) |
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| APA | Smart Define. (2016). constant thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/constant/thesaurus/antonyms |
| Chicago | Smart Define. 2016. "constant thesaurus" https://smartdefine.org/constant/thesaurus/antonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2016, constant thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/constant/thesaurus/antonyms>. |
| MLA | Smart Define. "constant thesaurus" 12 February 2016. Web. 22 September 2026. <https://smartdefine.org/constant/thesaurus/antonyms> |