Starosties is valid Scrabble Word

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

Definitions for STAROSTIES in dictionary:

Words related to STAROSTIES

starosty11
Find what other words can be done using letters: "starosties"
https://scrabble-word.com/finder/starosties
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