Yes, QUARK is a Scrabble word!

Letter values in Scrabble US: Q 10, U 1, A 1, R 1, K 5.

Is it a valid word?

QUARK is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3
fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet

QUARK was the Wordle answer on Jan. 11, 2026 (#1,667). Stuck on today’s? Use the Wordle helper.

Also: quark cheese.