164 entries under substantial topic. ×

15
fat(adjective, great, solid, heavy, important)
15
consequential(adjective, good, importance, heavy, important)
15
hefty(adjective, person, body, strong, great)
14
meaningful(adjective, good, importance, heavy, important)
13
serious(adjective, good, importance, heavy, important)
12
elephantine(adjective, heavy, awkward, round)
12
sizeable(adjective, significant, large)
11
whopping(adjective, great, large, generous)
11
copious(adjective, great, heavy, awkward)
10
sizable(adjective, open, great, high)
10
stout(adjective, person, body, strong, sound)
10
bountiful(adjective, good, kind, reasonable, easy)
9
goodly(adjective, great, significant, large)
9
abundant(adjective, quality, great, heavy, awkward)
9
essential(adjective, importance, important, significant)
8
obese(adjective, solid, heavy, round)
8
pregnant(adjective, reproduction, animal, heavy, awkward)
8
strapping(adjective, person, body, strong, great)
8
gross(adjective, great, heavy, awkward)
7
ponderous(adjective, great, heavy, significant)
10 years ago|57k views|share |citing 
APASmart Define. (2016). big thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/big/thesaurus/synonyms
ChicagoSmart Define. 2016. "big thesaurus" https://smartdefine.org/big/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, big thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/big/thesaurus/synonyms>.
MLASmart Define. "big thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/big/thesaurus/synonyms>