130 entries under significant topic. ×
| extraordinary(adjective, strong, great, solid, important) | |
| fab(outstanding, substantial, exciting, impressive) | |
| foremost(important, vital, imperative) | |
| front-page(big, substantial, valuable, vital) | |
| good-sized(substantial, definite, generous, considerable) | |
| heavyweight(adjective, heavy, huge, considerable) | |
| imperative(big, substantial, valuable, vital) | |
| importunate(big, substantial, valuable, vital) | |
| main(adjective, vital, imperative) | |
| major-league(important, considerable) | |
| marked(big, substantial, definite, valuable) | |
| mattering much(expression, big, substantial, valuable) | |
| mondo(great, substantial, fabulous, incredible) | |
| necessary(big, substantial, valuable, vital) | |
| of moment(expression, big, substantial, valuable) | |
| of note(expression, big, substantial, valuable) | |
| of substance(expression, big, substantial, valuable) | |
| paramount(vital, imperative) | |
| pressing(big, substantial, valuable, vital) | |
| relevant(adjective, great, big, substantial) |
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| APA | Smart Define. (2016). large thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/large/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "large thesaurus" https://smartdefine.org/large/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, large thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/large/thesaurus/synonyms>. |
| MLA | Smart Define. "large thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/large/thesaurus/synonyms> |