85 entries under noun topic. ×

23
foreigner(person, being, people, exile)
23
outlander(person, native, visitor, foreigner)
20
stranger(person, being, people, native)
19
immigrant(adjective, person, experience, being)
19
outsider(person, being, native, visitor)
17
newcomer(person, being, people, native)
13
unknown(adjective, obscure, experience, strange)
10
refugee(person, being, people, oppression)
10
extraterrestrial(adjective, unknown, extraneous, celestial)
9
extraterrestrial being(expression, idiom)
9
interloper(being, people, attacker, visitor)
8
emigrant(person, extraneousness)
7
noncitizen(being, foreigner, stranger, weeds)
7
visitor(being, foreigner, stranger, immigrant)
5
guest(being, visitor, foreigner, stranger)
4
expatriate(experience, distant, different, unfamiliar)
4
migrant(being, visitor, foreigner, stranger)
4
spaceman
3
exile
3
intruder(being, attacker, visitor, foreigner)
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APASmart Define. (2016). alien thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/alien/thesaurus/synonyms
ChicagoSmart Define. 2016. "alien thesaurus" https://smartdefine.org/alien/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, alien thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/alien/thesaurus/synonyms>.
MLASmart Define. "alien thesaurus" 13 February 2016. Web. 23 September 2026. <https://smartdefine.org/alien/thesaurus/synonyms>