HEADSTONE Scrabble 13 Words With Friends 13 Definition noun the central building block at the top of an arch or vault. — synonyms: keystone, key noun a stone that is used to mark a grave. — synonyms: gravestone, tombstone Anagrams of HEADSTONE headnotes See all 371 words you can make from HEADSTONE → 9-letter words Words starting with H Words ending with E ← Unscramble different letters