Alternatingly is valid Scrabble Word

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

Definitions for ALTERNATINGLY in dictionary:

Similar words containing ALTERNATING without suffix ly

alternating12
Find what other words can be done using letters: "alternatingly"
https://scrabble-word.com/finder/alternatingly
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