TIRELESSNESS Scrabble 12 Words With Friends 14 Scrabble letter values: T1I1R1E1L1E1S1S1N1E1S1S1 = 12 Definition noun tireless determination. — synonyms: indefatigability, indefatigableness See all 439 words you can make from TIRELESSNESS → 12-letter words Words starting with T Words ending with S ← Unscramble different letters