Alien
Alien noun - A person who comes from a foreign country; someone who does not owe allegiance to your country.
Extra-terrestrial and alien are semantically related. In some cases you can replace phrase "Extra-terrestrial" with "Alien", this terms are similar.
Extra-terrestrial
Alien and extra-terrestrial are semantically related. You can use "Alien" instead a noun phrase "Extra-terrestrial".
Mutual synonyms
Both words in one sentence
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Alien Invasion: This occurs in the ride, when an extra-terrestrial prison transport crashes into the city, freeing the prisoners.
- The extra-terrestrial "messenger" Astron, in Michael Tippett's opera The Ice Break, is sung simultaneously by a tenor and a mezzo-soprano, to emphasise its alien-ness and sexlessness.
Source: Voice of the Legion -
In an episode of Mork & Mindy, Mork decided to reveal his existence as an alien to a tabloid reporter who was offering a reward for anyone who could prove the existence of extra-terrestrial life.
Source: Your Costume Needs Work
Cite this Source
Extra-terrestrial and Alien. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/alien/extra-terrestrial
Alien & Extra-terrestrial. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/alien/extra-terrestrial>.
Extra-terrestrial or Alien. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/alien/extra-terrestrial.
