15
capacious(adjective, open, great, space, large)
15
elephantine(adjective, big, large, size, huge)
15
infinite(adjective, end, space, large, comfortable)
15
monumental(adjective, great, big, large, size)
15
voluminous(adjective, open, great, large, huge)
14
monstrous(adjective, great, big, large, size)
14
spacious(adjective, open, great, space, large)
13
jumbo(adjective, great, big, large, size)
13
measureless(adjective, large, huge, unrestrained, hidden)
12
ample(adjective, open, great, space, large)
12
limitless(adjective, large, comfortable, huge, unrestrained)
11
humongous(adjective, great, big, large, size)
11
unlimited(adjective, complete, large, unrestrained, extensive)
11
substantial(adjective, great, big, important, significant)
10
broad(adjective, large, huge, extensive, ample)
10
cyclopean(adjective, big, giant)
10
endless(adjective, open, large, comfortable, huge)
10
incalculable(adjective, uncertain, huge, unrestrained, endless)
10
unbounded(adjective, complete, large, huge, unrestrained)
10
wide(adjective, large, huge, extensive, ample)
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APASmart Define. (2015). vast thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/vast/thesaurus/synonyms
ChicagoSmart Define. 2015. "vast thesaurus" https://smartdefine.org/vast/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, vast thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/vast/thesaurus/synonyms>.
MLASmart Define. "vast thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/vast/thesaurus/synonyms>