Unprovably is valid Scrabble Word

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

Definitions for UNPROVABLY in dictionary:

Similar words containing PROVAB without suffix ly and without prefix un

provable15 provably18 approvable19 approvably22 improvable19 improvably22 reprovable17 unprovable17 disprovable19 provability21 irreprovable19 irreprovably22 provableness19 unreprovable19 improvability25 provabilities20 improvableness23 provablenesses21 improvabilities24
Find what other words can be done using letters: "unprovably"
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