4
immeasurable(great, big, huge, loads, heaps)
4
impressive(adjective, large, considerable)
4
infinite
4
king-size
4
largish(adjective, big, large, considerable)
4
mammoth(adjective, large)
4
plentiful(adjective, great, big, significant, substantial)
4
powerful
4
prodigious(adjective, large)
4
roomy(adjective, great, space, large, huge)
4
sensible(adjective, reasonable, substantial, large, generous)
4
significant(adjective, substantial, definite, large, considerable)
4
sound(adjective, strong, solid, big, important)
4
tall(adjective, big, high, lofty, length)
4
tremendous(adjective, large)
4
wide(adjective, open, great, big, substantial)
3
amplitudinous(adjective, size)
3
brawny
3
broad(adjective, open, great, big, large)
3
cavernous(adjective, large)
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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>