Yes, EASEMENT is a Scrabble word!

Letter values in Scrabble US: E 1, A 1, S 1, E 1, M 3, E 1, N 1, T 1.

Is it a valid word?

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

(law) the privilege of using something that is not your own (as using another's land as a right of way to your own land)
the act of reducing something unpleasant (as pain or annoyance)