ADVENTITIOUS Antonyms There are 3 antonyms of the word adventitious. (opposite meanings)Did you mean?Definition of ADVENTITIOUSSynonyms of ADVENTITIOUSAlso try opposite words for..adventitiouslyBest Opposite Words For ADVENTITIOUSTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1inherentadjectiveadj2innateadjectiveadj3intrinsicadjectiveadj Alternatives for INHERENT Words (17)intrinsicbuilt-inconstitutionalconnateessentialfundamentalimmanentimplicitinbornindwellinginherentinnatenaturalinbuiltingrainedintegralunderlyingPhrases (1)implicit inOpposite words for inherent Alternatives for INNATE Words (6)borncongenitalinbornnaturalunconditionedunlearnedOpposite words for innate Alternatives for INTRINSIC Words (10)essentialinherentinnatebasicconstitutivefundamentalimmanentnativenaturalintrinsicalOpposite words for intrinsic