PROTON is a playable word

proton Scrabble® Dictionary

noun
pl. protons
a subatomic particle
(adjective) protonic
38 Playable Words can be made from "PROTON"
   2-Letter Words (6 found)
   3-Letter Words (16 found)
   4-Letter Words (12 found)
   5-Letter Words (2 found)
   6-Letter Words (2 found)