Rookish is valid Scrabble Word

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

Definitions for ROOKISH in dictionary:

Words related to ROOKISH

rook8
Find what other words can be done using letters: "rookish"
https://scrabble-word.com/finder/rookish
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