A1 Antonyms There are 9 antonyms of the abbr a1. (opposite meanings)Did you mean?Definition of A1Best Opposite Words For A1Top 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1falseadjectiveadj2faultyadjectiveadj3flawedadjectiveadj4inaccurateadjectiveadj5incorrectadjectiveadj6invalidnoun, adjectiven, adj7mistakenadjectiveadj8unsoundadjectiveadj9wrongadjectiveadj Alternatives for FALSE Words (19)assumeddelusivefaithlesslyfakefauxfictitiousfictiveimitationleasemistakenoff-keypretendedshamsimulatedsourtraitorouslytreacherouslytreasonablyuntrueOpposite words for false Alternatives for FAULTY Words (29)defectiveincorrectwrongaberrantamissblemisheddamageddeceptivedeficienterroneousfallaciousfalsefaultyflawedimpairedimperfectinaccurateinadequateinauthenticincompletemisguidedmisleadingmistakensubstandardunreliableunsounduntruewarpedweakOpposite words for faulty Alternatives for FLAWED Words (8)blemisheddamageddefectivefaultyimpairedimperfectmarredsubstandardOpposite words for flawed Alternatives for INACCURATE Words (11)incorrectwrongerroneousfalsefaultyflawedimprecisemisleadingmistakenunfaithfulunreliableOpposite words for inaccurate Alternatives for INCORRECT Words (6)wrongfaultyerroneousfalseinaccuratemistakenOpposite words for incorrect Alternatives for INVALID Words (6)disablehandicapincapacitateshut-indisallowednonvalidOpposite words for invalid Alternatives for MISTAKEN Words (27)defectiveerroneousfallaciousfalsefaultyflawedillogicalinaccurateincorrectinvalidmisguidedmisleadingmistakenunfaithfulunfoundedunsounduntrueuntruthfulwrongmisconstruederrorerrfaultmisapprehensionmisidentifymisunderstandingslipOpposite words for mistaken Alternatives for UNSOUND Words (15)unstabledefectivedubiousfaultyflawedinaccurateincorrectinvalidquestionableunjustifiableunreliableweakbadfallaciousunfitPhrases (1)mentally illOpposite words for unsound