85 entries under hard topic. ×

2
obese(adjective, solid, big, heavy)
2
rock(adjective, strong, compact, tight)
2
solidified(solid, rigid, density)
2
stocky(deep, large, sturdy, fat)
2
tall
1
close-grained(adjective, close, set, tough)
1
hardened(strong, fit, solid, healthy)
1
impervious(tough, solid, sturdy, rigid)
1
massed(adjective, close, strong, heavy)
1
rooted(adjective, strong, solid, stable)
0
absurd
0
blubbery(deep, fat, broad, bulky)
0
brick wall(expression, adjective, calm, strong)
0
chunky(solid, awkward, deep, large)
0
complicated
0
congealed(solid, rigid)
0
demanding
0
difficult
0
dimensional(adjective, strong, compact, tight)
0
embellished
10 years ago|42k views|share |citing 
APASmart Define. (2016). substantial thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 24 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms>