142 entries under substantial topic. ×
| sturdy(adjective, large, considerable) | |
| tangible(adjective, definite, considerable) | |
| tolerable | |
| apparent(adjective, clear, definite, evident) | |
| bodily | |
| deep(adjective, good, strong, tough, severe) | |
| estimable(adjective, definite, considerable) | |
| far-reaching(adjective, severe, big, important) | |
| germane(adjective, important, serious, applicable) | |
| good-sized(definite, considerable) | |
| heavyweight(great, big, heavy, important) | |
| huge(adjective, important, large, extensive) | |
| imperative(adjective, big, important, determined) | |
| importunate(adjective, great, big, important) | |
| measurable(adjective, definite, considerable, numerical) | |
| perceptible(considerable, measurable, numerical) | |
| reasonable(adjective, good, sensible, large) | |
| recognizable(adjective, definite, considerable) | |
| renowned(adjective, big, important, outstanding) | |
| sober(adjective, energetic, big, heavy) |
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| APA | Smart Define. (2016). significant thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/significant/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, significant thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>. |
| MLA | Smart Define. "significant thesaurus" 4 March 2016. Web. 25 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms> |