IMPROMPTUS

Yes, IMPROMPTUS is a Scrabble word!

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

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, 23 points. Make Words with Friends your dictionary.Words with FriendsYour dictionary · ChangeValid · 23 points