PHOSPHOR /ˈfɒsfə/ Scrabble 18 Words With Friends 18 Scrabble letter values: P3H4O1S1P3H4O1R1 = 18 Definition noun a synthetic substance that is fluorescent or phosphorescent. Examples “used to coat the screens of cathode ray tubes” See all 42 words you can make from PHOSPHOR → 8-letter words Words starting with P Words ending with R ← Unscramble different letters