7 entries under expression topic. ×
| flying saucer(noun, object, ship, jet) | |
| extraterrestrial spacecraft(noun, object, rocket, spaceship) | |
| et air ship | |
| alien craft(noun, spaceship) | |
| area 51 craft | |
| mysterious sky sight | |
| flying machine(noun, balloon, jet, airplane) |
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| APA | Smart Define. (2015). ufo thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/ufo/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "ufo thesaurus" https://smartdefine.org/ufo/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, ufo thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/ufo/thesaurus/synonyms>. |
| MLA | Smart Define. "ufo thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/ufo/thesaurus/synonyms> |