Yes, rues is a Scrabble word!

Verb

1. Feel remorse for; feel sorry for; be contrite about

Noun

1. European strong-scented perennial herb with grey-green bitter-tasting leaves; an irritant similar to poison ivy

2. Leaves sometimes used for flavoring fruit or claret cup but should be used with great caution: can cause irritation like poison ivy

3. Sadness associated with some wrong done or some disappointment

4. (French) a street or road in France