MAMMOTH /ˈmæməθ/ Scrabble 16 Words With Friends 18 Definition adjective so exceedingly large or extensive as to suggest a giant or mammoth. — synonyms: gigantic noun any of numerous extinct elephants widely distributed in the Pleistocene. See all 37 words you can make from MAMMOTH → 7-letter words Words starting with M Words ending with H ← Unscramble different letters