Sphincterial is valid Scrabble Word

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

Definitions for SPHINCTERIAL in dictionary:

Similar words containing SPHINCTERI without suffix al

sphincteric20
Find what other words can be done using letters: "sphincterial"
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