Yes, DOL is a Scrabble word!

Letter values in Scrabble US: D 2, O 1, L 1.

Is it a valid word?

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

a unit of pain intensity
the federal department responsible for promoting the working conditions of wage earners in the United States; created in 1913

Also: department of labor, labor department.