8
vast(adjective, open, great, big, large)
7
healthy(adjective, fair, big, enthusiastic, vigorous)
7
major(adjective, big, substantial, large, huge)
6
capacious(adjective, great, substantial, large, extensive)
6
goodish
6
grand(adjective, great, big, large, huge)
6
huge(adjective, great, big, full, significant)
6
immense(adjective, open, great, big, large)
6
large-scale(adjective, big, substantial, large, grand)
5
colossal(adjective, great, big, high, large)
5
comprehensive(adjective, great, big, substantial, large)
5
copious(adjective, great, big, large, huge)
5
enormous(adjective, great, big, full, large)
5
gigantic(adjective, great, big, large, huge)
5
titanic
4
boundless(open, big, large, grand, huge)
4
expansive(adjective, large, size)
4
generous(adjective, great, fair, big, important)
4
gross(adjective, great, big, substantial, large)
4
humongous(adjective, great, big, large, huge)
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APASmart Define. (2016). sizable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/sizable/thesaurus/synonyms
ChicagoSmart Define. 2016. "sizable thesaurus" https://smartdefine.org/sizable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, sizable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/sizable/thesaurus/synonyms>.
MLASmart Define. "sizable thesaurus" 24 March 2016. Web. 21 September 2026. <https://smartdefine.org/sizable/thesaurus/synonyms>