Thirdsman is valid Scrabble Word

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

Definitions for THIRDSMAN in dictionary:

Words related to THIRDSMAN

intermediary18 thirdsmen15
Find what other words can be done using letters: "thirdsman"
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