| bulky | |
| circumplanetary | |
| cislunar | |
| conscienceless(adjective, expensive, high-priced, pricey, pricely) | |
| consumptive(adjective, expensive, high-priced, pricey, pricely) | |
| cosmical | |
| cosmologic | |
| cosmological(adjective, planetary, astral) | |
| cost-consuming(adjective, expensive, high-priced, pricey, pricely) | |
| cost intensive(adjective, expensive, high-priced, pricey, pricely) | |
| costive(adjective, expensive, high-priced, pricey, pricely) | |
| deluxe(adjective, expensive, high-priced, pricey, pricely) | |
| elephantine | |
| elevated | |
| empyreal | |
| empyrean | |
| endless | |
| enormously large | |
| equinoctial | |
| extortionate(adjective, expensive, high-priced, pricey, pricely) |
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| APA | Smart Define. (2015). astronomical thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/astronomical/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "astronomical thesaurus" https://smartdefine.org/astronomical/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2015, astronomical thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/astronomical/thesaurus/synonyms>. |
| MLA | Smart Define. "astronomical thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/astronomical/thesaurus/synonyms> |