Yes, TEAZEL is a Scrabble word!

Letter values in Scrabble US: T 1, E 1, A 1, Z 10, E 1, L 1.

Is it a valid word?

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

any of several herbs of the genus Dipsacus native to the Old World having flower heads surrounded by spiny bracts

Not playable in Scrabble US: TEASLE.