Seirs is valid Scrabble Word

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

Definitions for SEIRS in dictionary:

Words related to SEIRS

seir4

Similar words containing SEIR without suffix s

seir4
Find what other words can be done using letters: "seirs"
https://scrabble-word.com/finder/seirs
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