Subitise is valid Scrabble Word

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

Definitions for SUBITISE in dictionary:

Words related to SUBITISE

subitised12 subitises11 subitising13 subitize19

Words that contain SUBITISE

subitised12 subitises11
Find what other words can be done using letters: "subitise"
https://scrabble-word.com/finder/subitise
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