Yes, FILARIASES is a Scrabble word!

Letter values in Scrabble US: F 4, I 1, L 1, A 1, R 1, I 1, A 1, S 1, E 1, S 1.

Is it a valid word?

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

European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage
slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects

Also: redstem storksbill, pin grass, pin clover, erodium cicutarium.