Yes, yech is a Scrabble word!
...and is worth 12 points in Scrabble, and 11 points in Words with Friends
Yech is a valid Scrabble word.
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What Scrabble words can I make with the letters in yech?
Words that can be created with an extra letter added to yech:
There are 8 words that can be made by adding another letter to 'yech'.