Supergrowths is valid Scrabble Word

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

Definitions for SUPERGROWTHS in dictionary:

Words related to SUPERGROWTHS

supergrowth20
Find what other words can be done using letters: "supergrowths"
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