22 entries under extensive topic. ×

20
great(adjective, big, substantial, large, size)
19
ample(adjective, give, open, great, spread)
17
capacious(adjective, great, big, substantial, large)
16
big(adjective, great, substantial, large, size)
14
vast(adjective, open, great, large, huge)
13
spacious(adjective, great, big, substantial, large)
9
sizable(adjective, open, great, big, substantial)
9
roomy(adjective, open, great, spread, big)
9
wide(adjective, substantial, large, size)
8
comprehensive(adjective, great, big, substantial, large)
8
broad(adjective, great, big, substantial, large)
7
generous(adjective, give, open, great, big)
5
boundless(adjective, open, big, large, grand)
5
commodious(adjective, open, great, substantial, large)
2
extended(open, big, large, grand, comfortable)
2
far-reaching(spread, big, large, grand, thick)
2
widespread(open, big, large, grand, comfortable)
1
inclusive(spread, big, large, grand, thick)
1
scopic(spread, big, large, grand, thick)
1
scopious(great, big, large, grand, huge)
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APASmart Define. (2015). voluminous thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/voluminous/thesaurus/synonyms
ChicagoSmart Define. 2015. "voluminous thesaurus" https://smartdefine.org/voluminous/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, voluminous thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/voluminous/thesaurus/synonyms>.
MLASmart Define. "voluminous thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/voluminous/thesaurus/synonyms>