Yes, COONTIE is a Scrabble word!

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

Is it a valid word?

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

small tough woody zamia of Florida and West Indies and Cuba; roots and half-buried stems yield an arrowroot

Also: florida arrowroot, seminole bread, zamia pumila.