Unossified is valid Scrabble Word

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

Definitions for UNOSSIFIED in dictionary:

Similar words containing OSSIFI without suffix ed and without prefix un

ossific12 ossified12 ossifier11 ossifies11 ossifiers12 ossification17 ossifications18
Find what other words can be done using letters: "unossified"
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