Yes, whim is a Scrabble word!
...and is worth 12 points in Scrabble, and 12 points in Words with Friends
whim
Noun
1. A sudden desire
2. An odd or fanciful or capricious idea
What Scrabble words can I make with the letters in whim?
3 Letter Words
2 Letter Words
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Words that can be created with an extra letter added to whim:
S:whims