COSIEST

Yes, COSIEST is a Scrabble word!

Letter values in Scrabble US: C 3, O 1, S 1, I 1, E 1, S 1, T 1.C 3 · O 1 · S 1 · I 1 · E 1 · S 1 · T 1

Is it a valid word?

• Scrabble US: valid, 9 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 9 points
• Scrabble UK: valid, 9 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 9 points
• Words with Friends: valid, 10 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 10 points