| prohibitive(adjective, extraordinary, extreme, expensive, high-priced) | |
| sizable(significant, substantial, large) | |
| sizeable(adjective, significant, substantial, large, excessive) | |
| starry | |
| stiff(adjective, extraordinary, extreme, expensive, high-priced) | |
| super(significant, substantial, large) | |
| weighty(significant, substantial, large) | |
| whopping(adjective, huge) | |
| abnormal(adjective, extraordinary, extreme, high, prohibitive) | |
| abysmal | |
| ample(significant, substantial, large, huge, immense) | |
| amplitudinous | |
| anagalactic | |
| asteroidal | |
| astrologic | |
| astrologistic | |
| astrologous | |
| astronomically | |
| astronomy | |
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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> |