SHELLPROOF

Yes, SHELLPROOF is a Scrabble word!

Letter values in Scrabble US: S 1, H 4, E 1, L 1, L 1, P 3, R 1, O 1, O 1, F 4.S 1 · H 4 · E 1 · L 1 · L 1 · P 3 · R 1 · O 1 · O 1 · F 4

Is it a valid word?

• Scrabble US: valid, 18 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 18 points
• Scrabble UK: valid, 18 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 18 points
• Words with Friends: valid, 20 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 20 points