LIGHTPROOF

Yes, LIGHTPROOF is a Scrabble word!

Letter values in Scrabble US: L 1, I 1, G 2, H 4, T 1, P 3, R 1, O 1, O 1, F 4.L 1 · I 1 · G 2 · H 4 · T 1 · P 3 · R 1 · O 1 · O 1 · F 4

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