Synonyms|153Antonyms|7|Broader|2Narrower|2Related|78
6
hell
3
terrain
2
descends
2
ocean(noun, sky, air, atmosphere, haven)
1
inferno
1
perdition
0
sit
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APASmart Define. (2015). firmament thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/firmament/thesaurus/antonyms
ChicagoSmart Define. 2015. "firmament thesaurus" https://smartdefine.org/firmament/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, firmament thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/firmament/thesaurus/antonyms>.
MLASmart Define. "firmament thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/firmament/thesaurus/antonyms>