Pooper is valid Scrabble Word

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

Definitions for POOPER in dictionary:

Words related to POOPER

poopers11
Find what other words can be done using letters: "pooper"
https://scrabble-word.com/finder/pooper
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