Yes, CONTINENTAL is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, N 1, T 1, I 1, N 1, E 1, N 1, T 1, A 1, L 1.

Is it a valid word?

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

of or pertaining to or typical of Europe
of or relating to or concerning the American colonies during and immediately after the American Revolutionary War
of or relating to or characteristic of a continent
being or concerning or limited to a continent especially the continents of North America or Europe