8 letters · 10 points in Scrabble
noun a large thick pad filled with resilient material and often incorporating coiled springs, used as a bed or part of a bed
originFrom Middle English materas, from Old French, from Arabic مَطْرَح (maṭraḥ, “place where something is thrown”), from طَرَحَ (ṭaraḥa, “to throw”). Compare divan, from Persian via Turkish (both of Middle Eastern origin, due to the local custom of lying on padding on floor being foreign to Europeans).
Etymology from Wiktionary, CC BY-SA 3.0