Unidentifiably is valid Scrabble Word

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

Definitions for UNIDENTIFIABLY in dictionary:

Similar words containing IDENTIFIAB without suffix ly and without prefix un

identifiable18 identifiably21 unidentifiable20
Find what other words can be done using letters: "unidentifiably"
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