33 entries under big topic. ×

6
considerable(adjective, heavy, important, significant)
5
fat(adjective, heavy, substantial)
4
consequential(adjective, heavy, important, significant)
4
critical(adjective, great, heavy, important)
4
crucial(adjective, great, heavy, important)
4
important(adjective, great, heavy, important)
4
momentous(adjective, heavy, important, outstanding)
4
substantial(adjective, heavy, important, significant)
3
bulky(adjective, heavy, significant, substantial)
2
cumbersome(adjective, heavy, substantial)
2
material(heavy, significant, substantial, large)
2
overweight(heavy, substantial)
2
significant(great, heavy, important, substantial)
1
cumbrous(adjective, heavy, substantial)
1
fleshy(adjective, heavy, substantial)
1
forcible(adjective, heavy, substantial)
1
meaningful(great, heavy, important, significant)
1
stout(adjective, heavy, significant, substantial)
0
dense(heavy, substantial)
0
earnest(heavy, substantial)
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APASmart Define. (2016). heavyweight thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/heavyweight/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavyweight thesaurus" https://smartdefine.org/heavyweight/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, heavyweight thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/heavyweight/thesaurus/synonyms>.
MLASmart Define. "heavyweight thesaurus" 26 February 2016. Web. 25 September 2026. <https://smartdefine.org/heavyweight/thesaurus/synonyms>