Disproportionations is valid word

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

Definitions for DISPROPORTIONATIONS in dictionary:

Similar words containing PROPORTIONATION without suffix s and without prefix dis

disproportionation23
Find what other words can be done using letters: "disproportionations"
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