Thirdstream is valid Scrabble Word

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

Definitions for THIRDSTREAM in dictionary:

Words related to THIRDSTREAM

thirdstreams18

Words that contain THIRDSTREAM

thirdstreams18
Find what other words can be done using letters: "thirdstream"
https://scrabble-word.com/finder/thirdstream
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