Swiftnesses is valid Scrabble Word

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

Definitions for SWIFTNESSES in dictionary:

Words related to SWIFTNESSES

Find what other words can be done using letters: "swiftnesses"
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