Untremendous is valid Scrabble Word

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

Definitions for UNTREMENDOUS in dictionary:

Similar words containing TREMENDOU without suffix s and without prefix un

tremendous13 tremendously18 tremendousness17 tremendousnesse18 tremendousnesses19
Find what other words can be done using letters: "untremendous"
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