Apterism is valid Scrabble Word

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

Definitions for APTERISM in dictionary:

Words related to APTERISM

apterous10

Words that contain APTERISM

apterisms13
Find what other words can be done using letters: "apterism"
https://scrabble-word.com/finder/apterism
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