Harmoniser is valid Scrabble Word

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

Definitions for HARMONISER in dictionary:

Words related to HARMONISER

harmonisers16
Find what other words can be done using letters: "harmoniser"
https://scrabble-word.com/finder/harmoniser
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