Os is valid Scrabble Word

Is os a scrabble word?
Official Scrabble Players Dictionary YES
Official Tournament and Club Word List YES
Collins Scrabble Words YES
Is os valid Words with Friends?
Words with Friends YES

Definitions for OS in dictionary:

Words related to OS

ora3 osar4 ossa4

How to use OS in a sentence

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