Unpreferred is valid Scrabble Word

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

Definitions for UNPREFERRED in dictionary:

Similar words containing PREFERR without suffix ed and without prefix un

preferred15 preferrer14 preferrers15 preferring16 preferrable18
Find what other words can be done using letters: "unpreferred"
https://scrabble-word.com/finder/unpreferred
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