Yes, argyll is a Scrabble word!

Noun

1. A covered gravy holder of silver or other metal containing a detachable central vessel for hot water to keep the gravy warm

2. 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

3. A sock knitted or woven with an argyle design (usually used in the plural)