Unslumbrous is valid Scrabble Word

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

Definitions for UNSLUMBROUS in dictionary:

Similar words containing SLUMBROU without suffix s and without prefix un

slumbrous13 slumbrously18 slumbrousness17 slumbrousnesses19
Find what other words can be done using letters: "unslumbrous"
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