Uninventiveness is valid Scrabble Word

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

Definitions for UNINVENTIVENESS in dictionary:

Similar words containing INVENTIVENES without suffix s and without prefix un

inventiveness19 inventivenesses21
Find what other words can be done using letters: "uninventiveness"
https://scrabble-word.com/finder/uninventiveness
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