| irregular(careless, chance, casual, secondary, random) | |
| irrelevant(extra, worthless, pointless, repugnant, superfluous) | |
| mere chance | |
| musical note | |
| natural | |
| needless(adjective, casual, useless, extra, worthless) | |
| not-self | |
| not required(expression, adjective, useless, worthless, unwarranted) | |
| note | |
| objective | |
| occurring | |
| off-the-cuff(chance, unplanned, unpremeditated) | |
| offhand(adjective, careless, chance, casual, arbitrary) | |
| on foot | |
| ongoing | |
| optional(adjective, casual, useless, extra, worthless) | |
| other | |
| out of the blue(expression, idiom, extraordinary, wonderful, shocking) | |
| parenthetic | |
| parenthetical |
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Accidental on
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| APA | Smart Define. (2015). accidental thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/accidental/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "accidental thesaurus" https://smartdefine.org/accidental/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, accidental thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/accidental/thesaurus/synonyms>. |
| MLA | Smart Define. "accidental thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/accidental/thesaurus/synonyms> |