PTERIDOLOGY Scrabble 18 Words With Friends 20 Scrabble letter values: P3T1E1R1I1D2O1L1O1G2Y4 = 18 Definition noun the branch of botany that studies ferns. See all 569 words you can make from PTERIDOLOGY → 11-letter words Words starting with P Words ending with Y ← Unscramble different letters