Undatable is valid Scrabble Word

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

Definitions for UNDATABLE in dictionary:

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