91 entries under large topic. ×
| heavy(adjective, great, tough, severe, big) | |
| valuable(adjective, good, big, important, substantial) | |
| bountiful(adjective, substantial) | |
| major-league(adjective, strong, great, extraordinary, unusual) | |
| much(adverb, substantial) | |
| solid(adjective, extraordinary, proper, exceptional, substantial) | |
| strong(adjective, clear, open, intense, important) | |
| extensive(adjective, big, substantial, valuable) | |
| extraordinary(adjective, solid, superior, unusual, important) | |
| firm(adjective, substantial, key, considerable) | |
| generous(adjective, considerable) | |
| sizable(adjective, substantial, definite, considerable) | |
| sturdy(adjective, substantial, considerable) | |
| tolerable | |
| heavyweight(great, big, heavy, important, substantial) | |
| huge(adjective, important, substantial, extensive) | |
| imperative(adjective, big, important, determined, substantial) | |
| importunate(adjective, great, big, important, substantial) | |
| reasonable(adjective, good, sensible, substantial) | |
| renowned(adjective, big, important, outstanding, substantial) |
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| APA | Smart Define. (2016). significant thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/significant/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "significant thesaurus" https://smartdefine.org/significant/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, significant thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/significant/thesaurus/synonyms>. |
| MLA | Smart Define. "significant thesaurus" 4 March 2016. Web. 24 September 2026. <https://smartdefine.org/significant/thesaurus/synonyms> |