Unheaded is valid Scrabble Word

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

Definitions for UNHEADED in dictionary:

How to use UNHEADED in a sentence

Find what other words can be done using letters: "unheaded"
https://scrabble-word.com/finder/unheaded
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