- Definitions|1
- Thesaurus|464
- Abbreviations|0
27 entries under noun topic. ×
| alien(adjective, extraneous, not human) | |
| Martian(adjective, alien, celestial) | |
| exterior(adjective, outside, external) | |
| space being(expression, idiom, being, alien) | |
| space invader(expression, idiom, alien) | |
| extraterrestrial being(expression, idiom) | |
| E.T. | |
| foreigner | |
| adventurer | |
| audience | |
| creature from outer space(expression, idiom, alien) | |
| customer | |
| dago | |
| gringo | |
| guest | |
| incomer | |
| intelligent life form(expression, idiom) | |
| little green man | |
| men from outer space | |
| newcomer |
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| APA | Smart Define. (2016). extraterrestrial thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/extraterrestrial/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extraterrestrial thesaurus" https://smartdefine.org/extraterrestrial/thesaurus/synonyms (accessed September 29, 2026). |
| Harvard | Smart Define 2016, extraterrestrial thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/extraterrestrial/thesaurus/synonyms>. |
| MLA | Smart Define. "extraterrestrial thesaurus" 15 March 2016. Web. 29 September 2026. <https://smartdefine.org/extraterrestrial/thesaurus/synonyms> |