RESPONSUM

Yes, RESPONSUM is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, S 1, P 3, O 1, N 1, S 1, U 1, M 3.R 1 · E 1 · S 1 · P 3 · O 1 · N 1 · S 1 · U 1 · M 3

Is it a valid word?

• Scrabble US: valid, 13 points.Scrabble USYour dictionary · Change (go to the dictionary switch)Valid · 13 points
• Scrabble UK: valid, 13 points. Make Scrabble UK your dictionary.Scrabble UKYour dictionary · ChangeValid · 13 points
• Words with Friends: valid, 17 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 17 points