Here are some examples:
* Xenophobia: Fear of foreigners or strangers.
* Xenograft: A tissue or organ transplant from one species to another.
* Xenophile: A person who is attracted to foreign people, cultures, or languages.
* Xenon: A colorless, odorless, inert gas found in the atmosphere. (While Xenon itself is not "strange," its name comes from the Greek word "xenos," meaning "stranger" or "foreign.")