Yes, POLES is a Scrabble word!

Letter values in Scrabble US: P 3, O 1, L 1, E 1, S 1.

Is it a valid word?

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

a long (usually round) rod of wood or metal or plastic
a native or inhabitant of Poland
one of two divergent or mutually exclusive opinions
a linear measure of 16.5 feet
a square rod of land
one of two points of intersection of the Earth's axis and the celestial sphere
one of two antipodal points where the Earth's axis of rotation intersects the Earth's surface
a contact on an electrical device (such as a battery) at which electric current enters or leaves
a long fiberglass sports implement used for pole vaulting
one of the two ends of a magnet where the magnetism seems to be concentrated

Also: celestial pole, magnetic pole.