Chack is valid Scrabble Word

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

Definitions for CHACK in dictionary:

Words related to CHACK

bite6 chacked19 chacking20 chacks17

Words that contain CHACK

chacks17 chacked19 chacking20
Find what other words can be done using letters: "chack"
https://scrabble-word.com/finder/chack
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