ISOLEUCINE /ˌaɪ.səˈluː.siːn/ Scrabble 12 Words With Friends 16 Scrabble letter values: I1S1O1L1E1U1C3I1N1E1 = 12 Definition noun an essential amino acid found in proteins. Examples “isomeric with leucine” See all 268 words you can make from ISOLEUCINE → 10-letter words Words starting with I Words ending with E ← Unscramble different letters