QUARK /kwɑːk/ Scrabble 18 Words With Friends 19 Definition noun (physics) hypothetical truly fundamental particle in mesons and baryons. noun fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet. — synonyms: quark_cheese See all 6 words you can make from QUARK → 5-letter words Words starting with Q Words ending with K ← Unscramble different letters