150 entries under substantial topic. ×
| portentous(bad, big, sober, serious) | |
| potent(adjective, strong, sound, tough, severe) | |
| principal(noun, adjective, order, advance, start) | |
| robust(adjective, person, body, strong, hard) | |
| sedate(dull, quiet, big, sober) | |
| stable(adjective, strong, hard, sound, tough) | |
| stalwart(adjective, person, body, strong, sound) | |
| steady(adjective, strong, sound, tough, solid) | |
| tenacious(adjective, strong, sound, tough, solid) | |
| urgent(adjective, tough, severe, informal, big) | |
| vigorous(adjective, strong, sound, tough, severe) | |
| vital(adjective, informal, big, important, significant) | |
| well-founded(adjective, strong, sound, tough, solid) | |
| well-made(adjective, strong, sound, tough, solid) | |
| able(adjective, good, bad, strong, sound) | |
| abounding(great, rich, sufficient, plenty) | |
| aplenty(adjective, generous, abundant, extensive) | |
| capable(adjective, strong, sound, tough, solid) | |
| chief(order, great, tough, important) | |
| conspicuous(adjective, great, unusual, important, famous) |
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| APA | Smart Define. (2016). heavy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 25, 2026). |
| Harvard | Smart Define 2016, heavy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>. |
| MLA | Smart Define. "heavy thesaurus" 25 January 2016. Web. 25 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms> |