UMBOS

Yes, UMBOS is a Scrabble word!

Letter values in Scrabble US: U 1, M 3, B 3, O 1, S 1.U 1 · M 3 · B 3 · O 1 · S 1

Is it a valid word?

• Scrabble US: valid, 9 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 9 points
• Scrabble UK: valid, 9 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 9 points
• Words with Friends: valid, 12 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 12 points