33 entries under substantial topic. ×

6
big(adjective, great, informal, heavy, important)
6
considerable(adjective, big, heavy, important, significant)
5
fat(adjective, big, heavy)
4
consequential(adjective, big, heavy, important, significant)
4
critical(adjective, great, big, heavy, important)
4
crucial(adjective, great, big, heavy, important)
4
important(adjective, great, big, heavy, important)
4
momentous(adjective, big, heavy, important, outstanding)
3
bulky(adjective, big, heavy, significant)
2
cumbersome(adjective, big, heavy)
2
material(big, heavy, significant, large)
2
overweight(big, heavy)
2
significant(great, big, heavy, important)
1
big deal(expression, figure, heavy, star)
1
cumbrous(adjective, big, heavy)
1
fleshy(adjective, big, heavy)
1
forcible(adjective, big, heavy)
1
meaningful(great, big, heavy, important, significant)
1
stout(adjective, big, heavy, significant)
0
dense(big, heavy)
<12>
10 years ago|4.1k views|share |citing 
APASmart Define. (2016). heavyweight thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/heavyweight/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavyweight thesaurus" https://smartdefine.org/heavyweight/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, heavyweight thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/heavyweight/thesaurus/synonyms>.
MLASmart Define. "heavyweight thesaurus" 26 February 2016. Web. 24 September 2026. <https://smartdefine.org/heavyweight/thesaurus/synonyms>