1. (noun) foreigner, alien, noncitizen, outlander
a person who comes from a foreign country; someone who does not owe allegiance to your country
Synonyms: unknown, extraterrestrial, stranger, foreigner, alien, outsider, noncitizen, outlander, extraterrestrial being
Antonyms: native, intrinsic, intrinsical
2. (noun) stranger, alien, unknown
anyone who does not belong in the environment in which they are found
Synonyms: unknown region, extraterrestrial, stranger, unknown, terra incognita, unknown quantity, alien, noncitizen, outlander, extraterrestrial being, foreigner
Antonyms: intrinsic, native, intrinsical
3. (adj) extraterrestrial being, extraterrestrial, alien
a form of life assumed to exist outside the Earth or its atmosphere
Synonyms: unknown, stranger, extraterrestrial, alien, noncitizen, outlander, extraterrestrial being, foreigner
Antonyms: native, intrinsical, intrinsic
4. (adj) alien, foreign
not contained in or deriving from the essential nature of something
Synonyms: extraneous, foreign, exotic, alien, strange
Antonyms: intrinsical, native, intrinsic
5. (verb) alien, exotic
being or from or characteristic of another place or part of the world
Synonyms: foreign, exotic, alien
Antonyms: intrinsical, native, intrinsic
6. (verb) alien, alienate
transfer property or ownership
Synonyms: alienate, disaffect, estrange, alien
Antonyms: native, intrinsical, intrinsic
7. (verb) estrange, alienate, alien, disaffect
arouse hostility or indifference in where there had formerly been love, affection, or friendliness
Synonyms: alienate, disaffect, estrange, alien
Antonyms: native, intrinsical, intrinsic
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Synonyms and Antonyms of alien 
