Slabbiest is valid Scrabble Word

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

Definitions for SLABBIEST in dictionary:

Words related to SLABBIEST

slab6 slabbier12 slabby13
Find what other words can be done using letters: "slabbiest"
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