16 entries under much topic. ×

12
widely(adjective, adverb, far, roughly)
7
greatly(adverb, pretty, absolutely, far, fully)
4
considerably(adverb, pretty, absolutely, really, far)
3
very(adverb, really, far, extremely)
2
far(adjective, adverb, greatly, generally)
2
quite(adverb, absolutely, thoroughly, fully, completely)
2
significantly(adverb, far, greatly, highly)
1
absolutely(pretty, thoroughly, fully, completely, quite)
1
decidedly(adverb, pretty, absolutely, far)
1
extremely(adverb, pretty, absolutely, far)
1
notably(adverb, pretty, absolutely, far)
1
well(adverb, thoroughly, fully, greatly)
0
immeasurably(adverb, far, greatly, considerably)
0
incomparably(adverb, greatly, substantially, notably)
0
somewhat(adverb, greatly, substantially, significantly)
0
very much(expression, adverb, greatly, substantially)
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APASmart Define. (2015). extensively thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/extensively/thesaurus/synonyms
ChicagoSmart Define. 2015. "extensively thesaurus" https://smartdefine.org/extensively/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, extensively thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/extensively/thesaurus/synonyms>.
MLASmart Define. "extensively thesaurus" 19 June 2015. Web. 20 September 2026. <https://smartdefine.org/extensively/thesaurus/synonyms>