Untypable is valid Scrabble Word

Is untypable a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is untypable valid Words with Friends?
Words with Friends NO

Definitions for UNTYPABLE in dictionary:

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