polyphobia

noun2

1. •
   Fear, hatred, or dislike of, or prejudice against, polyamory or polyamorous people.

   • Just how bad a problem is polyphobia? I'm not willing to live anyplace where I have to be closeted […] — 1997
2. •
   Fear of many things; a collection of fears.

   • Obviously it was related to the entire gestalt of Simon's polyphobia and compensatory counterphobia. The boys used to watch horror movies on late-night television […] — 2008