164 entries under substantial topic. ×

7
lavish(adjective, good, kind, complete, reasonable)
7
roomy(adjective, open, great, large)
7
tidy(adjective, great, informal, significant)
7
chunky(adjective, heavy, awkward, round)
7
commodious(adjective, open, great, large)
7
corpulent(adjective, solid, heavy, awkward)
7
wide(adjective, open, great, large)
6
relevant(adjective, importance, significant, large)
6
healthy(adjective, good, strong, tough, solid)
6
portly(adjective, strong, solid, heavy)
6
powerful(adjective, good, person, body, strong)
6
principal(adjective, important, significant, large)
6
sturdy(adjective, person, body, strong, sound)
5
beefy(adjective, person, body, strong, heavy)
5
heavyweight(adjective, great, informal, heavy, important)
5
large-scale(adjective, significant, large, grand)
5
muscular(adjective, person, body, strong, sound)
5
overweight(adjective, solid, heavy, round)
5
super(adjective, great, important, significant)
4
comprehensive(adjective, great, large, grand)
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APASmart Define. (2016). big thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/big/thesaurus/synonyms
ChicagoSmart Define. 2016. "big thesaurus" https://smartdefine.org/big/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, big thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/big/thesaurus/synonyms>.
MLASmart Define. "big thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/big/thesaurus/synonyms>