164 entries under solid topic. ×

4
unchanging(adjective, close, correct, firm, honest)
4
well-built(adjective, calm, strong, sound, secure)
3
certain(adjective, good, strong, firm, honest)
3
durable(adjective, calm, strong, sound, secure)
3
hale(adjective, health, strong, sound, tough)
3
healthy(adjective, health, strong, sound, tough)
3
muscular(adjective, strong, sound, tough, fit)
3
tight(adjective, strong, tough, firm)
3
tried-and-true(adjective, good, strong, honest)
3
well-made(adjective, strong, sound, tough)
2
bound(adjective, strong, tough, flat, firm)
2
calm(adjective, strong, secure, firm, sensible)
2
changeless(adjective, firm, stable, fixed)
2
definite(adjective, good, strong, firm)
2
energetic(adjective, strong, sound, tough)
2
honest(adjective, close, strong, correct, firm)
2
immutable(adjective, calm, strong, secure, firm)
2
invariable(calm, strong, hard, certain)
2
permanent(calm, strong, firm, true)
2
positive(adjective, good, strong, intense)
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APASmart Define. (2015). staunch thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/staunch/thesaurus/synonyms
ChicagoSmart Define. 2015. "staunch thesaurus" https://smartdefine.org/staunch/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, staunch thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/staunch/thesaurus/synonyms>.
MLASmart Define. "staunch thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/staunch/thesaurus/synonyms>