Swither is valid Scrabble Word

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

Definitions for SWITHER in dictionary:

Words related to SWITHER

swithered16 swithering17 swithers14
Find what other words can be done using letters: "swither"
https://scrabble-word.com/finder/swither
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