THYRISTOR

Yes, THYRISTOR is a Scrabble word!

Letter values in Scrabble US: T 1, H 4, Y 4, R 1, I 1, S 1, T 1, O 1, R 1.T 1 · H 4 · Y 4 · R 1 · I 1 · S 1 · T 1 · O 1 · R 1

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: valid, 13 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 13 points