Unimportantly is valid Scrabble Word

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

Definitions for UNIMPORTANTLY in dictionary:

Similar words containing IMPORTANT without suffix ly and without prefix un

important13 importantly18 unimportant15 superimportant20
Find what other words can be done using letters: "unimportantly"
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