Shiftinesses is valid Scrabble Word

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

Definitions for SHIFTINESSES in dictionary:

Words related to SHIFTINESSES

shiftiness16
Find what other words can be done using letters: "shiftinesses"
https://scrabble-word.com/finder/shiftinesses
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