Superimpositions is valid word

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

Definitions for SUPERIMPOSITIONS in dictionary:

Similar words containing IMPOSITION without suffix s and without prefix super

imposition14 impositions15 reimposition16 reimpositions17 superimposition21
Find what other words can be done using letters: "superimpositions"
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