Yes, HAWKWEED is a Scrabble word!

Letter values in Scrabble US: H 4, A 1, W 4, K 5, W 4, E 1, E 1, D 2.

Is it a valid word?

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

any of various plants of the genus Pilosella
any of numerous often hairy plants of the genus Hieracium having yellow or orange flowers that resemble the dandelion