15
huge(adjective, great, big, substantial, large)
15
sweeping(adjective, open, great, complete, spread)
15
enormous(adjective, great, big, large, huge)
15
extended(adjective, clear, free, big, space)
15
thorough(adjective, complete, fancy, top, total)
14
wide-ranging(adjective, complete, total, big, full)
13
exhaustive(adjective, great, complete, top, full)
13
massive(adjective, great, big, substantial, large)
12
long(adjective, time, great, big, deep)
11
gargantuan(adjective, large)
11
full(adjective, open, great, complete, top)
11
copious(adjective, great, top, big, substantial)
11
gigantic(adjective, great, big, large, huge)
11
global(adjective, complete, distant, remote, universal)
11
titanic(adjective, strong, powerful, huge, vast)
10
all-encompassing(adjective, complete, total, big, substantial)
10
colossal(adjective, great, big, large, huge)
10
considerable(adjective, great, big, significant, substantial)
10
mammoth(adjective, large, huge, vast, immense)
10
sizable(adjective, open, great, big, substantial)
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APASmart Define. (2016). extensive thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extensive/thesaurus/synonyms
ChicagoSmart Define. 2016. "extensive thesaurus" https://smartdefine.org/extensive/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, extensive thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extensive/thesaurus/synonyms>.
MLASmart Define. "extensive thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/extensive/thesaurus/synonyms>