SUBPROBLEM

Yes, SUBPROBLEM is a Scrabble word!

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

Is it a valid word?

• Scrabble US: valid, 18 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 18 points
• Scrabble UK: valid, 18 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 18 points
• Words with Friends: valid, 24 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 24 points