Yes, AREOLAS is a Scrabble word!

Letter values in Scrabble US: A 1, R 1, E 1, O 1, L 1, A 1, S 1.

Is it a valid word?

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

small space in a tissue or body part such as the area between veins on a leaf or an insect's wing
small circular area such as that around the human nipple or an inflamed area around a pimple or insect bite

Also: ring of color.