Yes, devalue is a Scrabble word!
...and is worth 11 points in Scrabble, and 14 points in Words with Friends
devalue
Verb
1. Remove the value from; deprive of its value
2. Lower the value or quality of
3. Lose in value
What Scrabble words can I make with the letters in devalue?
6 Letter Words
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words