Yes, OKRA is a Scrabble word!

Letter values in Scrabble US: O 1, K 5, R 1, A 1.

Is it a valid word?

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

long green edible beaked pods of the okra plant
tall coarse annual of Old World tropics widely cultivated in southern United States and West Indies for its long mucilaginous green pods used as basis for soups and stews; sometimes placed in genus Hibiscus
long mucilaginous green pods; may be simmered or sauteed but used especially in soups and stews

Also: okra plant, lady's-finger, abelmoschus esculentus, hibiscus esculentus.