Unsubstantialities is valid word

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

Definitions for UNSUBSTANTIALITIES in dictionary:

Similar words containing SUBSTANTIALITIE without suffix s and without prefix un

substantialitie17 substantialities18 insubstantialities20
Find what other words can be done using letters: "unsubstantialities"
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