Yes, ADDRESSES is a Scrabble word!

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

Is it a valid word?

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

(computer science) the code that identifies where a piece of information is stored
the place where a person or organization can be found or communicated with
the act of delivering a formal spoken communication to an audience
the manner of speaking to another individual
a sign in front of a house or business carrying the conventional form by which its location is described
written directions for finding some location; written on letters or packages that are to be delivered to that location
the stance assumed by a golfer in preparation for hitting a golf ball
social skill

speak to
give a speech to
put an address on (an envelope)
direct a question at someone
address or apply oneself to something, direct one's efforts towards something, such as a question
greet, as with a prescribed form, title, or name
access or locate by address
act on verbally or in some form of artistic expression
speak to someone
adjust and aim (a golf ball) at in preparation of hitting

Also: computer address, name and address, savoir-faire, turn to, come up to.