Unsuperfluous is valid Scrabble Word

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

Definitions for UNSUPERFLUOUS in dictionary:

Similar words containing SUPERFLUOU without suffix s and without prefix un

superfluous16 superfluously21 superfluousness20 superfluousnesses22
Find what other words can be done using letters: "unsuperfluous"
https://scrabble-word.com/finder/unsuperfluous
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