Synonyms for "adventicious" (83 found)

Ranked by relevance and common usage.

Closest matches (17)

accidentalaccessoryacquiredadditionaladscititiousaleatoryappurtenantascititiousauxiliary

Adjective(8 words)

;accidentalaccidentaryacquiredadventialalienby accidentby the by

Strong matches (25)

casualcauselesschancechancycircumstantialcollateralconditionalcontingentdestinaldiceyextraextraneousextrinsicfatalfatidicflukyforeignfortuitous

Adjective(7 words)

casualcauselesschanceablecoincidentalexogenousextrinsicforeign

Related words (41)

Adjective(14 words)

fortuitousincidentallippeningoccasionaloutlandishrandomserendipitousspontaneoussporadicstrangeunforeseenunintendedunintentionalunplanned

iffyincidentalindeterminateindirectinessentialnonessentialoccasionalprovisionalriskysecondaryspontaneoussporadicsubsidiarysuperaddedsuperfluoussupervenientsupplementalsupplementaryuncausedundetermined

Show 7 more words

unessentialunexpectedunforeseeableunforeseenunlooked forunlooked-forunpredictable

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.