Slumminess is valid Scrabble Word

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

Definitions for SLUMMINESS in dictionary:

Words that contain SLUMMINESS

slumminesses16

Similar words containing SLUMMINES without suffix s

slumminesses16
Find what other words can be done using letters: "slumminess"
https://scrabble-word.com/finder/slumminess
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