17
influential(adjective, importance, powerful, valuable, main)
16
settled(adjective, strong, strain, firm, solid)
16
good(adjective, great, sound, right, reasonable)
16
grand(adjective, importance, valuable, main, notable)
16
hearty(adjective, strong, sound, complete, tough)
16
impressive(adjective, importance, valuable, main, notable)
16
meaningful(adjective, strong, importance, big, heavy)
15
corporeal(adjective, body, solid, physical, material)
15
key(adjective, importance, important, valuable, main)
15
massive(adjective, hard, great, big, heavy)
14
goodly(adjective, great, reasonable, big, important)
14
hefty(adjective, strong, hard, great, tough)
14
sizable(adjective, great, reasonable, fair, big)
13
rich(adjective, good, easy, large, generous)
13
vital(adjective, importance, important, valuable, main)
12
powerful(adjective, good, strong, sound, tough)
12
solemn(adjective, importance, valuable, main, notable)
12
tidy(adjective, great, reasonable, big, important)
12
valid(adjective, sound, right, reasonable, solid)
11
bulky(adjective, great, big, heavy, important)
10 years ago|42k views|share |citing 
APASmart Define. (2016). substantial thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/substantial/thesaurus/synonyms
ChicagoSmart Define. 2016. "substantial thesaurus" https://smartdefine.org/substantial/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, substantial thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/substantial/thesaurus/synonyms>.
MLASmart Define. "substantial thesaurus" 24 March 2016. Web. 23 September 2026. <https://smartdefine.org/substantial/thesaurus/synonyms>