Onstream is valid Scrabble Word

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

Definitions for ONSTREAM in dictionary:

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