Yes, busker is a Scrabble word!
...and is worth 12 points in Scrabble, and 14 points in Words with Friends
busker
Noun
1. A person who entertains people for money in public places (as by singing or dancing), usually while asking for money
What Scrabble words can I make with the letters in busker?
6 Letter Words
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words