CARBONIUM

Yes, CARBONIUM is a Scrabble word!

Letter values in Scrabble US: C 3, A 1, R 1, B 3, O 1, N 1, I 1, U 1, M 3.C 3 · A 1 · R 1 · B 3 · O 1 · N 1 · I 1 · U 1 · M 3

Is it a valid word?

• Scrabble US: valid, 15 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 15 points
• Scrabble UK: valid, 15 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 15 points
• Words with Friends: not a valid word. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeNot a valid word