Synonyms|1.4kAntonyms|650|Broader|15Narrower|0Related|2.9k

140 entries under significant topic. ×

9
relevant(adjective, importance, big, large)
9
visible(adjective, material, definite, real)
8
healthy(adjective, strong, complete, tough, fit)
8
major(adjective, good, great, reasonable, fair)
8
principal(adjective, big, important, large)
8
respectable(adjective, reasonable, large, generous)
7
extensive(adjective, great, big, large)
7
telling(adjective, strong, sound, reasonable, important)
6
extraordinary(adjective, important, large, remarkable)
6
factual(adjective, solid, physical, material, certain)
6
worthwhile(adjective, good, big, important)
5
meaty
4
estimable(definite, considerable)
4
forceful(adjective, strong, sound, tough, solid)
4
large-scale(adjective, big, large, sturdy)
3
central(adjective, important, vital, imperative)
3
crucial(adjective, big, heavy, important)
3
definite(adjective, big, certain, real)
3
heavyweight(adjective, big, heavy, important)
3
lavish(adjective, great, large, generous)
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APASmart Define. (2016). substantial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms>