Xenophobia is the fear, hatred, and/or revulsion felt towards another group, culture, and/or people. Xenophobia is the opposite of xenophilia.
Xenophobia has also come to mean, in science fiction novels and the like, a human fear or hatred for alien lifeforms or robots, but this is the less-relevant definition for us travelers.
“Xen-” comes from Greek xénos, which as an adjective means foreign or strange; as a noun, it means a foreigner or a stranger.
“-phobia” comes from Greek phobos, which means fear. It is common to use it as a standalone word these days, as well.
Also, though this isn’t travel-related, I can’t help but share with you how great my SEO checker by SEMrush is:
See that? My SEO checker tells me that to help this page rank better for the term “xenophobia,” I should add one semantically-related term: Donald Trump 🙂
How great is that!?!