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unidentified flying object
For more, visit Extraterrestrial_spacecraft on Power Thesaurus
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APASmart Define. (2011). extraterrestrial spacecraft thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/extraterrestrial_spacecraft/thesaurus/synonyms
ChicagoSmart Define. 2011. "extraterrestrial spacecraft thesaurus" https://smartdefine.org/extraterrestrial_spacecraft/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2011, extraterrestrial spacecraft thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/extraterrestrial_spacecraft/thesaurus/synonyms>.
MLASmart Define. "extraterrestrial spacecraft thesaurus" 24 May 2011. Web. 27 September 2026. <https://smartdefine.org/extraterrestrial_spacecraft/thesaurus/synonyms>