PROTONS Antonyms There are 9 antonyms of the word protons. (opposite meanings)Did you mean?Definition of PROTONSAlso try opposite words for..protonBest Opposite Words For PROTONSTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1atomsnounn2electronsnounn3ionsnounn4moleculesnounn5neutronsnounn6nucleinounn7particlesnounn8positronsnounn9quarksnounn Alternatives for ATOMS Words (5)corpusclemoleculemoteparticlespeckOpposite words for atoms Alternatives for ELECTRONS Words (1)negatronOpposite words for electrons Alternatives for MOLECULES Words (12)elementsatomscompoundsionsparticlesradicalssubstancesatomcorpusclemoteparticlespeckOpposite words for molecules Alternatives for NUCLEI Words (2)corekaryonPhrases (3)cell nucleuscore grouplens nucleusOpposite words for nuclei Alternatives for PARTICLES Words (11)atomsbitscorpusclesgrainsmoleculesspecksatomcorpusclemoleculemotespeckPhrases (1)subatomic particleOpposite words for particles Alternatives for POSITRONS Words (1)antielectronOpposite words for positrons