Callidities is valid Scrabble Word

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

Definitions for CALLIDITIES in dictionary:

Words related to CALLIDITIES

callid9 callidity15
Find what other words can be done using letters: "callidities"
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