14
sky(noun, blue, heaven, happiness, high)
14
heaven(noun, place, wonderful, high, draft)
13
welkin(noun, blue, heaven, high, air)
12
empyrean(noun, adjective, blue, heaven, happiness)
11
heavens(noun, blue, sky, world, vault)
7
vault(noun, blue, heaven, sky, heavens)
7
vault of heaven(noun, expression, idiom, blue, heaven)
6
sphere
5
air(noun, high)
4
celestial sphere(noun, expression, idiom, blue, heaven)
4
ether(noun, adjective, sky, heavenly, vault)
4
azure(noun, blue, happiness, glory, ecstasy)
4
blue(noun, heaven, glory, vault, paradise)
3
Zion(noun, transport, happiness, glory, ecstasy)
3
atmosphere(noun, blue, sky, happiness, glory)
3
canopy
3
skies
2
Arcadia(noun, transport, happiness, glory, ecstasy)
2
Elysium(noun, transport, happiness, glory, ecstasy)
2
afterworld(noun, transport, happiness, glory, ecstasy)
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APASmart Define. (2015). Firmament thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/firmament/thesaurus/synonyms
ChicagoSmart Define. 2015. "Firmament thesaurus" https://smartdefine.org/firmament/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, Firmament thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/firmament/thesaurus/synonyms>.
MLASmart Define. "Firmament thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/firmament/thesaurus/synonyms>