Restfullest is valid Scrabble Word

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

Definitions for RESTFULLEST in dictionary:

Words related to RESTFULLEST

restful10 restfuller13
Find what other words can be done using letters: "restfullest"
https://scrabble-word.com/finder/restfullest
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