22 entries under unplanned topic. ×
| irregular(adjective, chance, casual, rare, variable) | |
| infrequent(adjective, slight, thin, strange, exceptional) | |
| contingent(adjective, uncertainty, chance, secondary, subsidiary) | |
| accidental(adjective, chance, secondary, subsidiary, related) | |
| adventitious(adjective, chance, secondary, subsidiary, related) | |
| fortuitous(adjective, chance, secondary, subsidiary, related) | |
| unexpected(adjective, chance, unpremeditated) | |
| offhand(adjective, chance, unpremeditated) | |
| unpremeditated(adjective, chance) | |
| by chance(expression, idiom, chance, unpremeditated) | |
| serendipitous(adjective, chance, unpremeditated) | |
| extemporaneous(chance, unpremeditated) | |
| extempore(chance, unpremeditated) | |
| fluky(chance, various, miscellaneous, unpremeditated) | |
| impromptu(chance, unpremeditated) | |
| improvised(chance, unpremeditated) | |
| impulsive(chance, unpremeditated) | |
| off-the-cuff(chance, unpremeditated) | |
| spontaneous(chance, unpremeditated) | |
| unforeseen(chance, unpremeditated) |
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| APA | Smart Define. (2015). occasional thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/occasional/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "occasional thesaurus" https://smartdefine.org/occasional/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, occasional thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/occasional/thesaurus/synonyms>. |
| MLA | Smart Define. "occasional thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/occasional/thesaurus/synonyms> |