Unrewardingly is valid Scrabble Word

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

Definitions for UNREWARDINGLY in dictionary:

Similar words containing REWARDING without suffix ly and without prefix un

rewarding14 forewarding19 rewardingly19 unrewarding16
Find what other words can be done using letters: "unrewardingly"
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