202 entries under solid topic. ×

8
dependable(adjective, strong, tough, firm)
8
genuine(adjective, good, sound, right, reasonable)
8
healthy(adjective, strong, complete, tough, fit)
8
lusty(adjective, strong, fit, determined)
8
reliable(adjective, calm, strong, secure, tough)
8
well(adjective, strong, complete, tough, easy)
7
dense(adjective, set, strong, hard, tough)
7
secure(adjective, calm, quiet, strong, hard)
7
stalwart(adjective, calm, strong, sound, secure)
7
vigorous(adjective, strong, sound, complete, tough)
6
factual(adjective, physical, material, certain)
6
hardy(adjective, strong, sound, tough, fit)
6
rugged(adjective, strong, sound, fit)
6
sure(adjective, calm, strong, secure, continue)
6
thick(adjective, close, set, strong, hard)
6
well-founded(adjective, calm, good, strong, sound)
5
burly(adjective, strong, hard, fit)
5
close(adjective, set, strong, hard, tough)
5
compact(adjective, close, set, strong, hard)
5
effectual(adjective, complete, vigorous, sturdy)
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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>