Massiness is valid Scrabble Word

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

Definitions for MASSINESS in dictionary:

Words related to MASSINESS

massinesses13 massy10

Words that contain MASSINESS

massinesses13

Similar words containing MASSINES without suffix s

massinesses13
Find what other words can be done using letters: "massiness"
https://scrabble-word.com/finder/massiness
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