Slumberless is valid Scrabble Word

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

Definitions for SLUMBERLESS in dictionary:

Words related to SLUMBERLESS

slumber11

How to use SLUMBERLESS in a sentence

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