9
wide(adjective, substantial, large, size, extensive)
8
comprehensive(adjective, great, big, substantial, large)
8
considerable(adjective, great, big, substantial, large)
8
broad(adjective, great, big, substantial, large)
8
titanic
7
cavernous(adjective, big, large, vast)
7
colossal(adjective, great, big, awkward, large)
7
full(adjective, great, big, substantial, large)
7
generous(adjective, give, open, great, big)
7
grandiose(adjective, great, big, large, grand)
7
mammoth(adjective, large)
7
plentiful(adjective, give, great, big, substantial)
7
tremendous(adjective, large)
6
lofty(adjective, large, grand, impressive, overwhelming)
6
mighty(grand, size, impressive, overwhelming, imposing)
6
mountainous(great, big, grand, huge, impressive)
6
prodigious(adjective, large)
6
profuse(great, big, abundant, considerable, plentiful)
5
abundant(adjective, give, great, big, substantial)
5
boundless(adjective, open, big, large, grand)
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APASmart Define. (2015). voluminous thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/voluminous/thesaurus/synonyms
ChicagoSmart Define. 2015. "voluminous thesaurus" https://smartdefine.org/voluminous/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, voluminous thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/voluminous/thesaurus/synonyms>.
MLASmart Define. "voluminous thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/voluminous/thesaurus/synonyms>