FEMTOSECOND Scrabble 19 Words With Friends 22 Scrabble letter values: F4E1M3T1O1S1E1C3O1N1D2 = 19 Definition noun one quadrillionth (10^-15) of a second. Examples “one thousandth of a picosecond” See all 426 words you can make from FEMTOSECOND → 11-letter words Words starting with F Words ending with D ← Unscramble different letters