112 entries under significant topic. ×

12
sizeable(adjective, substantial, large)
12
notable(adjective, importance, important, famous)
11
outstanding(adjective, importance, important, famous)
10
stout(adjective, person, body, strong, sound)
10
bountiful(adjective, good, kind, reasonable, easy)
9
goodly(adjective, great, substantial, large)
9
essential(adjective, importance, important, substantial)
7
ponderous(adjective, great, heavy, substantial)
7
lavish(adjective, good, kind, complete, reasonable)
7
main(adjective, important, vital, principal)
7
tidy(adjective, great, informal, substantial)
7
good(adjective, kind, reasonable, easy, gentle)
6
prominent(adjective, good, important, famous)
6
relevant(adjective, importance, substantial, large)
6
eminent(adjective, good, great, important, famous)
6
powerful(adjective, good, person, body, strong)
6
principal(adjective, important, substantial, large)
6
sturdy(adjective, person, body, strong, sound)
5
heavyweight(adjective, great, informal, heavy, important)
5
large-scale(adjective, substantial, large, grand)
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APASmart Define. (2016). big thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/big/thesaurus/synonyms
ChicagoSmart Define. 2016. "big thesaurus" https://smartdefine.org/big/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, big thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/big/thesaurus/synonyms>.
MLASmart Define. "big thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/big/thesaurus/synonyms>