Numskulled is valid Scrabble Word

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

Definitions for NUMSKULLED in dictionary:

Similar words containing NUMSKULL without suffix ed

numskull14 numskulls15
Find what other words can be done using letters: "numskulled"
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