TREPHINATION Scrabble 17 Words With Friends 19 Scrabble letter values: T1R1E1P3H4I1N1A1T1I1O1N1 = 17 Definition noun an operation that removes a circular section of bone from the skull. See all 653 words you can make from TREPHINATION → 12-letter words Words starting with T Words ending with N ← Unscramble different letters