Swarthnesses is valid Scrabble Word

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

Definitions for SWARTHNESSES in dictionary:

Words related to SWARTHNESSES

swarthness16
Find what other words can be done using letters: "swarthnesses"
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