18 entries under idiom topic. ×

5
unknown person(noun, expression, alien, visitor)
1
foreign body(noun, expression, alien, visitor)
1
novus homo(expression, extraneousness)
1
persona non grata
0
au -fait(expression, knowledge)
0
au courant(expression, knowledge)
0
behind the curtain(expression, knowledge)
0
behind the scenes(expression, knowledge)
0
extraterrestrial being
0
foreign country
0
foreign customs territories
0
foreign element(expression, extraneousness)
0
foreign substance(expression, extraneousness)
0
in the secret(expression, knowledge)
0
new girl
0
terra incognita
0
unknown quantity
0
unknown region
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APASmart Define. (2016). stranger thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/stranger/thesaurus/synonyms
ChicagoSmart Define. 2016. "stranger thesaurus" https://smartdefine.org/stranger/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, stranger thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/stranger/thesaurus/synonyms>.
MLASmart Define. "stranger thesaurus" 3 January 2016. Web. 23 September 2026. <https://smartdefine.org/stranger/thesaurus/synonyms>