IMPROBABLE Antonyms There are 5 antonyms of the word improbable. (opposite meanings)Did you mean?Definition of IMPROBABLESynonyms of IMPROBABLEAlso try opposite words for..improbablyimprobabilityimprobablenessBest Opposite Words For IMPROBABLETop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1probableadjectiveadj2certainadverb, adjectiveadv, adj3likelyadverb, adjectiveadv, adj4plausibleadjectiveadj5possibleadjectiveadj Alternatives for PROBABLE Words (9)anticipatedconceivablecredibleexpectedfeasibleforeseeablelikelypossiblereasonableOpposite words for probable Alternatives for CERTAIN Words (20)sureassuredcategoricalclearconfidentconvinceddefinitepositivesatisfiedsecureself-assuredunambiguousunassailableundisputedunequivocalunquestionableunwaveringsealedsomeunavoidableOpposite words for certain Alternatives for LIKELY Words (13)liableanticipatedexpectedforeseeableinclinedplausiblepossiblepresumableprobablepronebelikepotentialprobablyPhrases (2)in all likelihoodin all probabilityOpposite words for likely Alternatives for PLAUSIBLE Words (8)believableconvincingcrediblefeasiblelikelypossibleprobablereasonableOpposite words for plausible Alternatives for POSSIBLE Words (22)achievabledoablelikelyplausibleviablepotentialaccessibleaccomplishableattainableavailableconceivablefeasibleobtainablepracticalprobablepromisingrealrealizablethinkableworkableoptionpossibilityOpposite words for possible