Onkus is valid Scrabble Word

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

Definitions for ONKUS in dictionary:

Words related to ONKUS

bad6 oncus7
Find what other words can be done using letters: "onkus"
https://scrabble-word.com/finder/onkus
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