Yes, rattler is a Scrabble word!
...and is worth 7 points in Scrabble, and 8 points in Words with Friends
rattler
Noun
1. Pit viper with horny segments at the end of the tail that rattle when shaken
2. A railroad train consisting of freight cars
What Scrabble words can I make with the letters in rattler?
6 Letter Words
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words