Yopper is valid Scrabble Word

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

Definitions for YOPPER in dictionary:

Words related to YOPPER

yoppers14

Words that contain YOPPER

yoppers14

Similar words containing YOPP without suffix er

yoppers14
Find what other words can be done using letters: "yopper"
https://scrabble-word.com/finder/yopper
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