NEUTRON Antonyms There are 4 antonyms of the word neutron. (opposite meanings)Did you mean?Definition of NEUTRONAlso try opposite words for..neutronsBest Opposite Words For NEUTRONTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1electronnounn2photonnounn3positronnoun, adjectiven, adj4protonnounn Alternatives for ELECTRON Words (1)negatronOpposite words for electron Alternatives for POSITRON Words (1)antielectronOpposite words for positron