Unpreventable is valid Scrabble Word

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

Definitions for UNPREVENTABLE in dictionary:

How to use UNPREVENTABLE in a sentence

Find what other words can be done using letters: "unpreventable"
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