Alien
Alien noun - A person who comes from a foreign country; someone who does not owe allegiance to your country.
Visitor is a synonym for alien in extraterrestrial topic. In some cases you can use "Visitor" instead a noun "Alien", when it comes to topics like foreigner, foreign being.
Visitor
Visitor noun - A person who visits another.
Mutual synonyms
How words are described
Both words in one sentence
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His explanation that being a "strange visitor from another planet" means being genuinely alien culminates in a polite invitation to stay for dinner.
Source: Alien Lunch - In The King of Beasts by Philip José Farmer, an alien scientist shows a visitor how he's cloning several now-extinct animals.
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Perspective Flip: A human astronaut is seen as an alien invader by most of the locals, with a few realizing that he is actually a peaceful visitor.
Source: Western Animation / Planet 51
Cite this Source
Visitor and Alien. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/alien/visitor
Alien & Visitor. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/alien/visitor>.
Visitor or Alien. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/alien/visitor.
Google Ngram Viewer shows how "alien" and "visitor" have occurred on timeline