50 entries under calm topic. ×

16
sturdy(adjective, person, body, strong)
12
tough(adjective, person, body, strong)
10
solid(adjective, person, body, strong)
10
stout(adjective, person, body, strong)
10
substantial(adjective, strong, sound, secure)
9
durable(adjective, strong, sound, secure)
7
sound(adjective, strong, secure, tough)
5
firm(adjective, strong, sound, heavy)
4
staunch(adjective, strong, sound, secure)
3
stalwart(adjective, person, body, strong)
3
steady(adjective, strong, sound, secure)
2
enduring(adjective, strong, sound, secure)
2
lasting(strong, solid, steady, substantial)
2
well-founded(adjective, strong, sound, secure)
1
abiding(strong, solid, steady, substantial)
1
anchored(strong, solid, steady, substantial)
1
balanced(strong, solid, steady, substantial)
1
brick-wall(strong, solid, steady, substantial)
1
brick wall(expression, adjective, strong, solid)
1
constant(strong, solid, steady, substantial)
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APASmart Define. (2015). well-built thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/well-built/thesaurus/synonyms
ChicagoSmart Define. 2015. "well-built thesaurus" https://smartdefine.org/well-built/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, well-built thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/well-built/thesaurus/synonyms>.
MLASmart Define. "well-built thesaurus" 17 July 2015. Web. 26 September 2026. <https://smartdefine.org/well-built/thesaurus/synonyms>