Grues is valid Scrabble Word

Is grues a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is grues valid Words with Friends?
Words with Friends YES

Definitions for GRUES in dictionary:

Words related to GRUES

grue5
Find what other words can be done using letters: "grues"
https://scrabble-word.com/finder/grues
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