SYNTHETIC SUBSTANCE Antonyms There are 5 antonyms of the phrase synthetic substance. (opposite meanings)Did you mean?Definition of SYNTHETIC SUBSTANCESynonyms of SYNTHETIC SUBSTANCEAlso try opposite words for..substancesynthesizeBest Opposite Words For SYNTHETIC SUBSTANCETop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1authenticadjectiveadj2genuineadjectiveadj3naturaladjectiveadj4organicadjectiveadj5realadjectiveadj Alternatives for AUTHENTIC Words (12)reliablegenuinerealtrustworthylegitimateoriginaltruevalidcredibleunquestionableveritableunfakedPhrases (1)bona fideOpposite words for authentic Alternatives for GENUINE Words (12)realtrueactualauthentichonestlegitimateoriginalsincereechtliteralnaturalunfeignedPhrases (1)bona fideOpposite words for genuine Alternatives for NATURAL Words (26)innateinstinctiveauthenticgenuineinbornindigenousinherentintrinsicorganicpurerealspontaneousunadulteratedunaffectedunspoileduntouchedinstinctualbiologicalborncancelinevitablelifelikenecessaryrawreasonablerudeOpposite words for natural Alternatives for ORGANIC Words (3)constituentconstitutionalconstitutivePhrases (2)organic fertiliserorganic fertilizerOpposite words for organic Alternatives for REAL Words (22)actualgenuineauthenticmaterialsubstantialtangibletrueconcretehonestphysicalsinceresolidvalidveritableexistentheartfeltliteralrattlingreallyveridicalveryreiPhrases (2)bona fidereal numberOpposite words for real