Yes, PLATE is a Scrabble word!

Letter values in Scrabble US: P 3, L 1, A 1, T 1, E 1.

Is it a valid word?

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

(baseball) base consisting of a rubber slab where the batter stands; it must be touched by a base runner in order to score
a sheet of metal or wood or glass or plastic
a full-page illustration (usually on slick paper)
dish on which food is served or from which food is eaten
the quantity contained in a plate
a rigid layer of the Earth's crust that is believed to drift slowly
the thin under portion of the forequarter
a main course served on a plate
any flat platelike body structure or part
the positively charged electrode in a vacuum tube
a flat sheet of metal or glass on which a photographic image can be recorded
structural member consisting of a horizontal beam that provides bearing and anchorage
a shallow receptacle for collection in church
a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners)
a dental appliance that artificially replaces missing teeth

PLATE was the Wordle answer on April 20, 2023 (#670). Stuck on today’s? Use the Wordle helper.

Also: home plate, home base, crustal plate, photographic plate, collection plate, dental plate.