Yes, etymon is a Scrabble word!
...and is worth 11 points in Scrabble, and 12 points in Words with Friends
etymon
Noun
1. A simple form inferred as the common basis from which related words in several languages can be derived by linguistic processes
What Scrabble words can I make with the letters in etymon?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words