Clottinesses is valid Scrabble Word

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

Definitions for CLOTTINESSES in dictionary:

Words related to CLOTTINESSES

clottiness12
Find what other words can be done using letters: "clottinesses"
https://scrabble-word.com/finder/clottinesses
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