Yes, GRAIN is a Scrabble word!

Letter values in Scrabble US: G 2, R 1, A 1, I 1, N 1.

Is it a valid word?

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

a relatively small granular particle of a substance
foodstuff prepared from the starchy grains of cereal grasses
the side of leather from which the hair has been removed
a weight unit used for pearls or diamonds: 50 mg or 1/4 carat
1/60 dram; equals an avoirdupois grain or 64.799 milligrams
1/7000 pound; equals a troy grain or 64.799 milligrams
dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
a cereal grass
the smallest possible unit of anything
the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric
the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)

GRAIN was the Wordle answer on Dec. 27, 2024 (#1,287). Stuck on today’s? Use the Wordle helper.

Also: food grain, metric grain.