SEMIPERMEABLE /ˌsɛmaɪ-/ Scrabble 21 Words With Friends 26 Scrabble letter values: S1E1M3I1P3E1R1M3E1A1B3L1E1 = 21 Definition adjective (of a membrane) selectively permeable. See all 831 words you can make from SEMIPERMEABLE → 13-letter words Words starting with S Words ending with E ← Unscramble different letters