GRAVITON /ˈɡɹavɪtɒn/ Scrabble 12 Words With Friends 15 Scrabble letter values: G2R1A1V4I1T1O1N1 = 12 Definition noun a gauge boson that mediates the (extremely weak) gravitational interactions between particles. See all 175 words you can make from GRAVITON → 8-letter words Words starting with G Words ending with N ← Unscramble different letters