75 entries under substantial topic. ×

4
able(adjective, strong, sound, tough, fit)
4
estimable(significant, definite, considerable)
4
powerful(adjective, strong, sound, tough, fit)
4
secure(adjective, clear, sound, solid, pure)
4
sinewy(adjective, strong, hard, tough, solid)
4
strapping(adjective, strong, sound, tough, right)
3
appreciable(adjective, significant, considerable, noticed)
3
generous(adjective, fair, big, enthusiastic, vigorous)
3
heavy(adjective, solid, powerful, sturdy)
3
mighty(adjective, strong, hard, sound, tough)
3
sensible(adjective, sound, big, significant, rational)
3
significant(adjective, big, important, definite)
3
staunch(adjective, health, strong, sound, tough)
2
durable(adjective, strong, hard, solid, heavy)
2
hard as nails(expression, adjective, idiom, strong, hard)
2
in fine feather(expression, adjective, idiom, good, strong)
2
material(adjective, significant, definite, considerable)
2
steady(adjective, sound, sensible, solid, heavy)
1
capable(adjective, strong, sound, tough, fit)
1
definite(adjective, pleasant, big, significant)
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APASmart Define. (2016). healthy thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/healthy/thesaurus/synonyms
ChicagoSmart Define. 2016. "healthy thesaurus" https://smartdefine.org/healthy/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2016, healthy thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/healthy/thesaurus/synonyms>.
MLASmart Define. "healthy thesaurus" 24 March 2016. Web. 26 September 2026. <https://smartdefine.org/healthy/thesaurus/synonyms>