Disfluency is valid Scrabble Word

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

Definitions for DISFLUENCY in dictionary:

Words related to DISFLUENCY

disfluencies18
Find what other words can be done using letters: "disfluency"
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