Unlettered is valid Scrabble Word

Is unlettered a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is unlettered valid Words with Friends?
Words with Friends YES

Definitions for UNLETTERED in dictionary:

How to use UNLETTERED in a sentence

Find what other words can be done using letters: "unlettered"
https://scrabble-word.com/finder/unlettered
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