164 entries under substantial topic. ×
| of moment(expression, important, significant, valuable) | |
| of note(expression, significant, valuable, vital) | |
| of substance(expression, significant, valuable, vital) | |
| plenteous(great, complete, sufficient, plentiful) | |
| pressing(significant, valuable, vital, imperative) | |
| reasonable(adjective, good, kind, fair, significant) | |
| reinforced(adjective, strong, sound, tough, solid) | |
| secure(adjective, strong, sound, tough, solid) | |
| sensible(adjective, good, great, reasonable, fair) | |
| sinewy(adjective, strong, sound, tough, solid) | |
| solid gold(expression, important, significant, large) | |
| something else(expression, important, noble, grand) | |
| standout(significant, valuable, vital, imperative) | |
| to the max(expression, idiom, important, significant) | |
| tolerable(pleasant, fair, agreeable, large) | |
| unreal(important, significant, large) | |
| unrestricted(great, large, grand, huge) | |
| urgent(significant, valuable, vital, imperative) | |
| venerable(important, significant, large) | |
| vigorous(adjective, strong, sound, tough, solid) |
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| APA | Smart Define. (2016). big thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/big/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "big thesaurus" https://smartdefine.org/big/thesaurus/synonyms (accessed September 24, 2026). |
| Harvard | Smart Define 2016, big thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/big/thesaurus/synonyms>. |
| MLA | Smart Define. "big thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/big/thesaurus/synonyms> |