135 entries under strong topic. ×

19
tight(adjective, close, hard, strain)
19
unyielding(adjective, hard, sound, tough)
18
momentous(adjective, importance, big, heavy)
16
settled(adjective, strain, firm, solid)
16
hearty(adjective, sound, complete, tough)
16
meaningful(adjective, importance, big, heavy)
14
hefty(adjective, hard, great, tough)
12
powerful(adjective, good, sound, tough)
11
tough(adjective, calm, hard, solid)
10
heavy(adjective, give, hard, great)
10
well-built(adjective, calm, sound, secure)
8
dependable(adjective, tough, firm, solid)
8
healthy(adjective, complete, tough, fit)
8
lusty(adjective, fit, solid, determined)
8
potent(adjective, good, sound, right)
8
prosperous(adjective, characteristic, calm, quiet, quality)
8
reliable(adjective, calm, secure, tough)
8
well(adjective, complete, tough, easy)
7
dense(adjective, set, hard, tough)
7
secure(adjective, calm, quiet, hard)
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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>