Yes, prosper is a Scrabble word!
...and is worth 11 points in Scrabble, and 13 points in Words with Friends
prosper
Verb
1. Make steady progress; be at the high point in one's career or reach a high point in historical significance or importance
What Scrabble words can I make with the letters in prosper?
7 Letter Words
6 Letter Words
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words