Antivivisectionist is valid word

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

Definitions for ANTIVIVISECTIONIST in dictionary:

Words that contain ANTIVIVISECTIONIST

antivivisectionists27
Find what other words can be done using letters: "antivivisectionist"
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