Alien
Alien adjective - Being, relating to, or characteristic of a country other than one's own.
Usage example: new immigrants with customs alien to the community where they have settled
Foreign is a synonym for alien in behaviour topic. In some cases you can use "Foreign" instead an adjective "Alien", when it comes to topics like property, native, distant, strange. popular alternative
Foreign
Foreign adjective - Being, relating to, or characteristic of a country other than one's own.
Usage example: more Americans should take an interest in foreign languages
Alien is a synonym for foreign in unfamiliar topic. You can use "Alien" instead the word "Foreign" as an adjective or a noun, if it concerns topics such as behaviour, experience, property, native. popular alternative
Nearby Word: foreigner
Mutual synonyms
Both words in one sentence
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These characters have a moral framework that is so utterly alien and foreign to human experience that we can't peg them as "good" or "evil".
Source: Blue and Orange Morality - When visiting alien or foreign cultures, some amount of Culture Clash is inevitable.
Source: Protocol Peril -
Planet of Hats All alien or foreign cultures are homogenous, and a single stereotype or quirk applies to everyone from that place.
Source: Settings
Cite this Source
Foreign and Alien. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/alien/foreign
Alien & Foreign. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/alien/foreign>.
Foreign or Alien. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/alien/foreign.
Google Ngram Viewer shows how "alien" and "foreign" have occurred on timeline