NIACIN Scrabble 8 Words With Friends 11 Scrabble letter values: N1I1A1C3I1N1 = 8 Definition noun a B vitamin essential for the normal function of the nervous system and the gastrointestinal tract. — synonyms: nicotinic_acid See all 13 words you can make from NIACIN → 6-letter words Words starting with N Words ending with N ← Unscramble different letters