Yes, HAWKBILL is a Scrabble word!

Letter values in Scrabble US: H 4, A 1, W 4, K 5, B 3, I 1, L 1, L 1.

Is it a valid word?

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

pugnacious tropical sea turtle with a hawk-like beak; source of food and the best tortoiseshell

Also: hawksbill turtle, tortoiseshell turtle, eretmochelys imbricata.