Undams is valid Scrabble Word

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

Definitions for UNDAMS in dictionary:

Words related to UNDAMS

undam8
Find what other words can be done using letters: "undams"
https://scrabble-word.com/finder/undams
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