Multibillionaire is valid word

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

Definitions for MULTIBILLIONAIRE in dictionary:

Words that contain MULTIBILLIONAIRE

multibillionaires21
Find what other words can be done using letters: "multibillionaire"
https://scrabble-word.com/finder/multibillionaire
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