5
persuasive(adjective, good, strong, sound, right)
5
ponderable(adjective, material, tangible, materiality)
5
pregnant(adjective, big, awkward, large, fat)
5
profitable(adjective, good, useful, rewarding)
5
staunch(adjective, calm, strong, sound, secure)
5
sufficient(adjective, great, big, full, abundant)
5
thickset(adjective, hard, solid, heavy, deep)
5
trustworthy(good, sound, right, reasonable, rational)
5
unshakable(adjective, strong, hard, continue, solid)
5
veritable(adjective, physical, material, real, actual)
5
wide(adjective, hard, great, big, deep)
4
authoritative(adjective, good, strong, sound, right)
4
believable
4
bounteous(adjective, give, great, big, rich)
4
decent
4
effective
4
efficacious(adjective, good, strong, sound, right)
4
estimable(significant, definite, considerable)
4
existent(adjective, physical, material, real, positive)
4
fair
<1678910>
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>