ISONIAZID

Yes, ISONIAZID is a Scrabble word!

Letter values in Scrabble US: I 1, S 1, O 1, N 1, I 1, A 1, Z 10, I 1, D 2.I 1 · S 1 · O 1 · N 1 · I 1 · A 1 · Z 10 · I 1 · D 2

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, 20 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 20 points