150 entries under substantial topic. ×

6
cumbrous(adjective, easy, big, heavy, awkward)
6
somber(adjective, upset, dull, quiet, severe)
6
sturdy(adjective, person, body, strong, hard)
5
critical(adjective, great, harsh, extraordinary, big)
5
forceful(adjective, strong, sound, tough, solid)
5
heavyweight(noun, adjective, order, great, tough)
5
significant(adjective, great, tough, severe, big)
5
staid(dull, quiet, big, sober)
5
strapping(adjective, person, body, strong, sound)
5
wide(adjective, hard, great, deep)
4
earnest(adjective, dull, quiet, big, important)
4
healthy(adjective, solid, powerful, sturdy)
4
muscular(adjective, person, body, strong, sound)
4
overflowing(adjective, rich, abundant, extensive)
4
sober(dull, quiet, big, serious)
4
weighted(adjective, big, weight, weighty)
3
generous(adjective, give, great, big)
3
meaningful(adjective, dull, quiet, tough, severe)
3
pressing(adjective, tough, severe, big, important)
3
unyielding(adjective, strong, hard, sound, tough)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 25 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>