IMPERVIOUSNESS Scrabble 21 Words With Friends 26 Scrabble letter values: I1M3P3E1R1V4I1O1U1S1N1E1S1S1 = 21 Definition noun the quality of being impenetrable (by people or light or missiles etc.). — synonyms: impenetrability See all 1195 words you can make from IMPERVIOUSNESS → 14-letter words Words starting with I Words ending with S ← Unscramble different letters