Yes, RIGHT is a Scrabble word!

Letter values in Scrabble US: R 1, I 1, G 2, H 4, T 1.

Is it a valid word?

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

an abstract idea of that which is due to a person or governmental body by law or tradition or nature; it is something that nobody can take away"
location near or direction toward the right side; i.e. the side to the south when a person or object faces east
the piece of ground in the outfield on the catcher's right
those who support political or social or economic conservatism; those who believe that things are better left unchanged
the hand that is on the right side of the body
a turn toward the side of the body that is on the south when the person is facing east
anything in accord with principles of justice
(frequently plural) the interest possessed by law or custom in some intangible thing

being or located on or directed toward the side of the body to the east when facing north
free from error; especially conforming to fact or truth
socially right or correct
in conformance with justice or law or morality
correct in opinion or judgment
appropriate for a condition or purpose or occasion or a person's character, needs
of or belonging to the political or intellectual right
in or into a satisfactory condition
intended for the right hand
in accord with accepted standards of usage or procedure
having the axis perpendicular to the base
(of the side of cloth or clothing) facing or intended to face outward
most suitable or right for a particular purpose
precisely accurate

RIGHT was the Wordle answer on Sept. 24, 2023 (#827). Stuck on today’s? Use the Wordle helper.

Also: right field, right wing, right hand, right-hand, in good order, the right way, right on.

Not playable in Scrabble US: RIGHTFIELD.