Yes, bookmark is a Scrabble word!
...and is worth 20 points in Scrabble, and 22 points in Words with Friends
bookmark
Noun
1. A marker (a piece of paper or ribbon) placed between the pages of a book to mark the reader's place
What Scrabble words can I make with the letters in bookmark?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words