Premissing is valid Scrabble Word

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

Definitions for PREMISSING in dictionary:

Words related to PREMISSING

premiss11
Find what other words can be done using letters: "premissing"
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