NUCLEON Antonyms There are 3 antonyms of the word nucleon. (opposite meanings)Did you mean?Definition of NUCLEONSynonyms of NUCLEONAlso try opposite words for..nucleonsnucleonicBest Opposite Words For NUCLEONTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1electronnounn2neutronnounn3protonnounn Alternatives for ELECTRON Words (1)negatronOpposite words for electron