97 entries under significant topic. ×
| earnest(big, substantial, valuable, vital) | |
| essential(big, substantial, large, valuable) | |
| esteemed(vital, imperative) | |
| exigent(big, substantial, valuable, vital) | |
| fat(great, big, substantial, large) | |
| foremost(vital, imperative) | |
| front-page(big, substantial, valuable, vital) | |
| heavy(adjective, great, big, important) | |
| heavyweight(large, considerable) | |
| imperative(big, substantial, valuable, vital) | |
| importunate(big, substantial, valuable, vital) | |
| influential(strong, powerful, substantial, large) | |
| marked(big, substantial, large, valuable) | |
| material(big, substantial, large, valuable) | |
| mattering much(expression, big, substantial, valuable) | |
| meaningful(big, substantial, large, valuable) | |
| momentous(big, substantial, large, valuable) | |
| mondo(substantial, large, vast, massive) | |
| necessary(big, substantial, valuable, vital) | |
| of moment(expression, big, substantial, valuable) |
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| APA | Smart Define. (2016). extensive thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/extensive/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extensive thesaurus" https://smartdefine.org/extensive/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2016, extensive thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/extensive/thesaurus/synonyms>. |
| MLA | Smart Define. "extensive thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/extensive/thesaurus/synonyms> |