Yes, EVADES is a Scrabble word!

Letter values in Scrabble US: E 1, V 4, A 1, D 2, E 1, S 1.

Is it a valid word?

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

avoid or try to avoid fulfilling, answering, or performing (duties, questions, or issues)
escape, either physically or mentally
practice evasion
use cunning or deceit to escape or avoid

Also: put off.