Sises is valid Scrabble Word

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

Definitions for SISES in dictionary:

Words related to SISES

sis3 sisses6
Find what other words can be done using letters: "sises"
https://scrabble-word.com/finder/sises
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