6
innumerable(adjective, immense, infinite, boundless, unlimited)
6
king-size(adjective, huge, copious)
5
excessive(adjective, expensive, greatness, high-priced, pricey)
5
extended(adjective, open, big, space, large)
5
extreme(adjective, expensive, greatness, high-priced, pricey)
5
far-reaching(adjective, spread, big, large, grand)
5
herculean(adjective, big, huge, immense, monstrous)
5
inordinate(adjective, expensive, greatness, high-priced, pricey)
5
massy(adjective, big, giant)
5
never-ending(adjective, large, absolute, huge, immense)
5
numberless(adjective, complete, indefinite, immense, infinite)
5
untold(adjective, uncertain, unrestrained, endless, immense)
5
vasty(adjective, size)
4
Bunyanesque(adjective, big, giant)
4
considerable(adjective, strong, great, big, powerful)
4
copious(adjective, great, big, large, huge)
4
countless(adjective, complete, absolute, indefinite, immense)
4
deep(adjective, complete, spread, large, thick)
4
exorbitant(adjective, expensive, greatness, high-priced, pricey)
4
extravagant(adjective, expensive, greatness, high-priced, pricey)
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APASmart Define. (2015). vast thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/vast/thesaurus/synonyms
ChicagoSmart Define. 2015. "vast thesaurus" https://smartdefine.org/vast/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, vast thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/vast/thesaurus/synonyms>.
MLASmart Define. "vast thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/vast/thesaurus/synonyms>