Supercows is valid Scrabble Word

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

Definitions for SUPERCOWS in dictionary:

Words related to SUPERCOWS

supercow15
Find what other words can be done using letters: "supercows"
https://scrabble-word.com/finder/supercows
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