Their is valid Scrabble Word

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

Definitions for THEIR in dictionary:

Words that contain THEIR

theirs9 theirself15 theirselves17

How to use THEIR in a sentence

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