Unmetrical is valid Scrabble Word

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

Definitions for UNMETRICAL in dictionary:

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