Obos is valid Scrabble Word

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

Definitions for OBOS in dictionary:

Words related to OBOS

obo5
Find what other words can be done using letters: "obos"
https://scrabble-word.com/finder/obos
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