Synonyms|26Antonyms|0|Broader|0Narrower|0Related|19
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alien
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allergen(noun, irritant)
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antigen(noun, irritant)
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dander(noun, irritant)
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dust mite(noun, expression, irritant)
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easterner
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element
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emigrant
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exteriority
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extraneousness
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foreign
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foreigner
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greaser
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homo
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immigrant
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immune trigger(noun, expression, irritant)
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intruder
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irritant
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newcomer
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outsider
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APASmart Define. (2013). foreign substance thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/foreign_substance/thesaurus/synonyms
ChicagoSmart Define. 2013. "foreign substance thesaurus" https://smartdefine.org/foreign_substance/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, foreign substance thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/foreign_substance/thesaurus/synonyms>.
MLASmart Define. "foreign substance thesaurus" 19 May 2013. Web. 20 September 2026. <https://smartdefine.org/foreign_substance/thesaurus/synonyms>