ISOMORPHIC

Yes, ISOMORPHIC is a Scrabble word!

Letter values in Scrabble US: I 1, S 1, O 1, M 3, O 1, R 1, P 3, H 4, I 1, C 3.I 1 · S 1 · O 1 · M 3 · O 1 · R 1 · P 3 · H 4 · I 1 · C 3

Is it a valid word?

• Scrabble US: valid, 19 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 19 points
• Scrabble UK: valid, 19 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 19 points
• Words with Friends: valid, 21 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 21 points