EITHER Antonyms There are 4 antonyms of the word either. (opposite meanings)Did you mean?Definition of EITHERBest Opposite Words For EITHERTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1alladjectiveadj2both3neithernounn4nonenoun, adjectiven, adj Alternatives for ALL Words (7)completelyaltogetherentirelyrighttotallywholewhollyOpposite words for all Alternatives for NEITHER Words (2)nonenorOpposite words for neither Alternatives for NONE Words (8)nonenooncapstoneluncheonmiddaynonesnoontidetwelveOpposite words for none