Synonyms|5Antonyms|0|Broader|0Narrower|0Related|0

5 entries under noun topic. ×

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Martian
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alien
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creature from outer space(expression, idiom, extraterrestrial)
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extraterrestrial
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space invader(expression, extraterrestrial)
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APASmart Define. (1970). intelligent life form thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/intelligent_life_form/thesaurus/synonyms
ChicagoSmart Define. 1970. "intelligent life form thesaurus" https://smartdefine.org/intelligent_life_form/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 1970, intelligent life form thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/intelligent_life_form/thesaurus/synonyms>.
MLASmart Define. "intelligent life form thesaurus" 1 January 1970. Web. 30 September 2026. <https://smartdefine.org/intelligent_life_form/thesaurus/synonyms>