ARDUOUSNESS Scrabble 12 Words With Friends 15 Scrabble letter values: A1R1D2U1O1U1S1N1E1S1S1 = 12 Definition noun extreme effortfulness. — synonyms: strenuousness See all 452 words you can make from ARDUOUSNESS → 11-letter words Words starting with A Words ending with S ← Unscramble different letters