5 letters · 10 points in Scrabble
noun a fabric with a nap that is longer and softer than velvet
adjective characterized by extravagance and profusion
originFrom French peluche (“fluff, plush”). The fact that historically (in past centuries) plush upholstery was so expensive as to be socially exclusive undoubtedly connects the senses of "luxurious" and "soft".
Etymology from Wiktionary, CC BY-SA 3.0