3
fatal(adjective, accidental)
3
indeterminate(adjective, chance 2)
3
inessential
3
provisional
3
successful(happy, fortunate, opportune, blessed, fluky)
3
uncaused(adjective, chance 2)
3
undetermined(adjective, chance 2)
3
unlooked-for
3
unnecessary
2
added
2
aimless(adjective, accidental)
2
ascititious
2
coincidental(secondary, subsidiary, related, unintentional, unintended)
2
conditional
2
fortunate(adjective, happy, opportune, blessed, accidental)
2
good
2
inadvertent(adjective, unintentional, accidental, unintended)
2
involuntary
2
needless
2
odd(adjective, chance, secondary, subsidiary, related)
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APASmart Define. (2015). adventitious thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/adventitious/thesaurus/synonyms
ChicagoSmart Define. 2015. "adventitious thesaurus" https://smartdefine.org/adventitious/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, adventitious thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/adventitious/thesaurus/synonyms>.
MLASmart Define. "adventitious thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/adventitious/thesaurus/synonyms>