Lotsa is valid Scrabble Word

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

Definitions for LOTSA in dictionary:

Words that contain LOTSA

flotsam12 flotsams13
Find what other words can be done using letters: "lotsa"
https://scrabble-word.com/finder/lotsa
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