Yes, SHINLEAF is a Scrabble word!

Letter values in Scrabble US: S 1, H 4, I 1, N 1, L 1, E 1, A 1, F 4.

Is it a valid word?

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

North American evergreen with small pinkish bell-shaped flowers and oblong leaves used formerly for shinplasters

Also: wild lily of the valley, pyrola elliptica.