Compositionists is valid Scrabble Word

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

Definitions for COMPOSITIONISTS in dictionary:

Similar words containing MPOSITIONIST without suffix s and without prefix co

compositionist20
Find what other words can be done using letters: "compositionists"
https://scrabble-word.com/finder/compositionists
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