Plumbnesses is valid Scrabble Word

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

Definitions for PLUMBNESSES in dictionary:

Words related to PLUMBNESSES

plumbness15
Find what other words can be done using letters: "plumbnesses"
https://scrabble-word.com/finder/plumbnesses
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