- Definitions|0
- Thesaurus|222
- Abbreviations|1
| forcible(heavy, substantial) | |
| weighty(adjective, heavy, important, substantial) | |
| considerable(adjective, heavy, substantial) | |
| critical(heavy, important, substantial, essential) | |
| crucial(heavy, important, substantial, essential) | |
| heavy(adjective, unusual, important, exceptional) | |
| meaningful(adjective, unusual, heavy, important) | |
| momentous(adjective, heavy, substantial) | |
| portentous(adjective, heavy, substantial) | |
| serious(adjective, unusual, heavy, important) | |
| significant(adjective, unusual, heavy, important) | |
| solemn(adjective, heavy, substantial) | |
| substantial(adjective, heavy) | |
| big deal(expression, heavy, substantial) | |
| bulky(heavy, substantial) | |
| burdensome(heavy, substantial) | |
| consequential(heavy, substantial) | |
| cumbersome(heavy, substantial) | |
| cumbrous(heavy, substantial) | |
| dense(heavy, substantial) |
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| APA | Smart Define. (2015). underlined thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/underlined/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "underlined thesaurus" https://smartdefine.org/underlined/thesaurus/synonyms (accessed September 21, 2026). |
| Harvard | Smart Define 2015, underlined thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/underlined/thesaurus/synonyms>. |
| MLA | Smart Define. "underlined thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/underlined/thesaurus/synonyms> |