90 entries under adjective topic. ×

3
inessential
3
uncaused
3
undetermined
3
unlooked-for
3
unnecessary
2
added
2
aimless
2
fortunate(happy, opportune, blessed, accidental)
2
inadvertent(unintentional, accidental, unintended)
2
needless
2
odd(chance, secondary, subsidiary, related)
2
uncalculated(unintentional, unintended)
2
unimportant
2
unneeded
2
unpredictable
2
unpremeditated(chance, haphazard, unplanned, accidental)
1
adventitial
1
alien
1
arbitrary
1
dispensable
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APASmart Define. (2015). adventitious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/adventitious/thesaurus/synonyms
ChicagoSmart Define. 2015. "adventitious thesaurus" https://smartdefine.org/adventitious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, adventitious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/adventitious/thesaurus/synonyms>.
MLASmart Define. "adventitious thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/adventitious/thesaurus/synonyms>