Yes, ruth is a Scrabble word!

Noun

1. United States professional baseball player famous for hitting home runs (1895-1948)

2. The great-grandmother of king David whose story is told in the Book of Ruth in the Old Testament

3. A feeling of sympathy and sorrow for the misfortunes of others

4. A book of the Old Testament that tells the story of Ruth who was not an Israelite but who married an Israelite and who stayed with her mother-in-law Naomi after her husband died