Yes, stout is a Scrabble word!

Adjective

1. Dependable

2. Euphemisms for `fat'

3. Having rugged physical strength; inured to fatigue or hardships

Noun

1. A strong very dark heavy-bodied ale made from pale malt and roasted unmalted barley and (often) caramel malt with hops

2. A garment size for a large or heavy person