Yes, effaces is a Scrabble word!
...and is worth 15 points in Scrabble, and 16 points in Words with Friends
effaces
Verb
1. Remove completely from recognition or memory
2. Make inconspicuous
3. Remove by or as if by rubbing or erasing
What Scrabble words can I make with the letters in effaces?
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Words that can be created with an extra letter added to effaces:
R:effacers