Cloysome is valid Scrabble Word

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

Definitions for CLOYSOME in dictionary:

Words related to CLOYSOME

cloying13
Find what other words can be done using letters: "cloysome"
https://scrabble-word.com/finder/cloysome
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