Yes, ARGYLE is a Scrabble word!

Letter values in Scrabble US: A 1, R 1, G 2, Y 4, L 1, E 1.

Is it a valid word?

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

a covered gravy holder of silver or other metal containing a detachable central vessel for hot water to keep the gravy warm
a design consisting of a pattern of varicolored diamonds on a solid background (originally for knitted articles); patterned after the tartan of a clan in western Scotland
a sock knitted or woven with an argyle design (usually used in the plural)