Tristesse is valid Scrabble Word

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

Definitions for TRISTESSE in dictionary:

Words related to TRISTESSE

sadness8 tristesses10

Words that contain TRISTESSE

tristesses10
Find what other words can be done using letters: "tristesse"
https://scrabble-word.com/finder/tristesse
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