bidiphobia

means a fera of things that happen twice, or there are two of, and the fear of the number 2 in general.
Teacher: Ok kids, what is 2+2- Billy Bob: AHHHHHHHHHHHHH I HAVE BIDIPHOBIA!!!!
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polymultimorphphobia

The fear of things that can change into multiple other things.
As the piano changed into a drumset, Bert remembered he had polymultimorphphobia.
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