147 entries under significant topic. ×
| venerable(big, important, substantial, large) | |
| abundant(substantial, large) | |
| ample(substantial, large) | |
| appreciable(substantial, large) | |
| astronomical(substantial, large) | |
| bountiful(substantial, large) | |
| comfortable(substantial, large) | |
| commodious(substantial, large) | |
| de rigueur(expression, adjective, basic, vital) | |
| exceptional(big, substantial, valuable, vital) | |
| expedient(adjective, basic, vital, necessary) | |
| goodly(substantial, large) | |
| grassroots(important, basic, vital) | |
| hefty(substantial, large) | |
| huge(substantial, large) | |
| incumbent on(expression, adjective, basic, vital) | |
| large-scale(substantial, large) | |
| lavish(substantial, large) | |
| noticeable(substantial, large) | |
| plentiful(substantial, large) |
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| APA | Smart Define. (2016). essential thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/essential/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "essential thesaurus" https://smartdefine.org/essential/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, essential thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/essential/thesaurus/synonyms>. |
| MLA | Smart Define. "essential thesaurus" 31 March 2016. Web. 24 September 2026. <https://smartdefine.org/essential/thesaurus/synonyms> |