SUBSYSTEM

Yes, SUBSYSTEM is a Scrabble word!

Letter values in Scrabble US: S 1, U 1, B 3, S 1, Y 4, S 1, T 1, E 1, M 3.S 1 · U 1 · B 3 · S 1 · Y 4 · S 1 · T 1 · E 1 · M 3

Is it a valid word?

• Scrabble US: valid, 16 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 16 points
• Scrabble UK: valid, 16 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 16 points
• Words with Friends: valid, 18 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 18 points