INTERFLUOUS Antonyms There are 4 antonyms of the word interfluous. (opposite meanings)Did you mean?Definition of INTERFLUOUSSynonyms of INTERFLUOUSAlso try opposite words for..interfluentinterfluenceBest Opposite Words For INTERFLUOUSTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1crucialadjectiveadj2essentialadjectiveadj3necessaryadverb, adjectiveadv, adj4vitaladjectiveadj Alternatives for CRUCIAL Words (17)essentialimportantcriticaldecisivefundamentalimperativeindispensableintegralkeymomentousnecessaryparamountpivotalsignificantsubstantivevitalall-importantPhrases (1)of the essenceOpposite words for crucial Alternatives for ESSENTIAL Words (16)crucialindispensablenecessaryrequisitebasicfundamentalimperativeimportantkeyprimarysignificantvitalall-importantnecessityrequirementsubstantivePhrases (1)of the essenceOpposite words for essential Alternatives for NECESSARY Words (17)essentialrequisitecompulsorycrucialimperativeimportantindispensablemandatoryneededneedfulobligatoryrequiredvitalinevitablenaturalnecessityrequirementOpposite words for necessary Alternatives for VITAL Words (18)crucialnecessarycriticalessentialfundamentalimperativeimportantindispensablekeyparamountpivotalrequisiteextantkickinglivesignificantlife-sustaininglivelyOpposite words for vital