ACT UP Antonyms There are 4 antonyms of the phrase act up. (opposite meanings)Did you mean?Definition of ACT UPAlso try opposite words for..upactactsactoractingBest Opposite Words For ACT UPTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1behaveverbv2complyverbv3conformverbv4cooperateverbv Alternatives for BEHAVE Words (8)comportacquitactbearcarryconductdeportdoOpposite words for behave Alternatives for COMPLY Words (13)followabideaccedeacceptacquiesceadhereagreeconformobeyobservesuccumbyieldconsummatePhrases (3)carry outgive wayabide byOpposite words for comply Alternatives for CONFORM Words (5)acquiesceadaptadjustcomplysubmitPhrases (1)knuckle underOpposite words for conform Alternatives for COOPERATE Words (2)coactcollaboratePhrases (1)join forcesAbbreviations (1)co-opOpposite words for cooperate