Humourlessly is valid Scrabble Word

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

Definitions for HUMOURLESSLY in dictionary:

Similar words containing HUMOURLESS without suffix ly

humourless15 humourlessness19
Find what other words can be done using letters: "humourlessly"
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