Mirthlessnesses is valid Scrabble Word

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

Definitions for MIRTHLESSNESSES in dictionary:

Words related to MIRTHLESSNESSES

mirthlessness18
Find what other words can be done using letters: "mirthlessnesses"
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