OSTINATO

Yes, OSTINATO is a Scrabble word!

Letter values in Scrabble US: O 1, S 1, T 1, I 1, N 1, A 1, T 1, O 1.O 1 · S 1 · T 1 · I 1 · N 1 · A 1 · T 1 · O 1

Is it a valid word?

• Scrabble US: valid, 8 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 8 points
• Scrabble UK: valid, 8 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 8 points
• Words with Friends: valid, 9 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 9 points