Mou is valid Scrabble Word

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

Definitions for MOU in dictionary:

Words related to MOU

mous6 mouth10
Find what other words can be done using letters: "mou"
https://scrabble-word.com/finder/mou
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