- Definitions|2
- Thesaurus|925
- Abbreviations|0
| uncalculated(adjective, unintentional, unintended) | |
| unimportant | |
| unneeded | |
| unpredictable | |
| unpremeditated(adjective, chance, haphazard, unplanned, accidental) | |
| accessorial | |
| acquired | |
| advantageous(happy, fortunate, opportune, blessed, fluky) | |
| adventitial | |
| adventive | |
| alien | |
| all systems go(expression, idiom, happy, fortunate, opportune) | |
| appurtenant | |
| arbitrary | |
| auspicious(happy, fortunate, opportune, blessed, fluky) | |
| benefical | |
| beneficial(happy, fortunate, opportune, blessed, fluky) | |
| benign(happy, fortunate, opportune, blessed, fluky) | |
| blessed(happy, fortunate, opportune, fluky) | |
| chancy |
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| APA | Smart Define. (2015). adventitious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/adventitious/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "adventitious thesaurus" https://smartdefine.org/adventitious/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, adventitious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/adventitious/thesaurus/synonyms>. |
| MLA | Smart Define. "adventitious thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/adventitious/thesaurus/synonyms> |