| alternate | |
| at different times | |
| auxiliary | |
| ceremonial | |
| effortless | |
| fluctuating(adjective, regular, routine, unreliable, uneven) | |
| fragmentary(adjective, unreliable, uneven, variable, erratic) | |
| hit-or-miss(adjective, irregular, erratic, random, haphazard) | |
| inconstant(adjective, unreliable, uneven, variable, erratic) | |
| indirect(adjective, circumstantial) | |
| insouciant | |
| insufficient(adjective, slight, short, inadequate, limited) | |
| intermitting | |
| isolated(adjective, infrequent) | |
| ritual | |
| seasonal(adjective, regular, irregular, routine, infrequent) | |
| semioccasional(adjective, light, slight, thin, strange) | |
| stray | |
| supplementary | |
| unexpected(adjective, chance, unplanned, unpremeditated) |
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| APA | Smart Define. (2015). occasional thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/occasional/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "occasional thesaurus" https://smartdefine.org/occasional/thesaurus/synonyms (accessed September 26, 2026). |
| Harvard | Smart Define 2015, occasional thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/occasional/thesaurus/synonyms>. |
| MLA | Smart Define. "occasional thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/occasional/thesaurus/synonyms> |