ROBUSTER Antonyms There are 3 antonyms of the word robuster. (opposite meanings)Did you mean?Definition of ROBUSTERAlso try opposite words for..robustrobustestBest Opposite Words For ROBUSTERTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1fraileradjectiveadj2weakeradjectiveadj3frailadjectiveadj Alternatives for FRAILER Words (5)delicatefalliblefragileimperfectweakOpposite words for frailer Alternatives for WEAKER Words (20)feeblefrailwateryassailabledebiledecrepitdilutefaintfallibleimperfectinfirmlightpowerlessricketysaplessunaccentedvinciblevulnerablewashyweaklyOpposite words for weaker Alternatives for FRAIL Words (15)delicatefragileweakailingdebilitateddecrepitfeebleinfirmshakysicklytotteringunsoundenfeebledfallibleimperfectOpposite words for frail