66 entries under sturdy topic. ×

5
durable(adjective, set, firm, solid, steady)
5
fast(adjective, close, correct, firm, honest)
5
stabile(adjective, calm, smooth, right, flat)
5
sure(adjective, close, set, clear, correct)
4
settled(adjective, strong, firm, solid, determined)
4
solid(adjective, severe, firm, harsh, certain)
4
staunch(adjective, close, correct, firm, honest)
4
unfaltering(adjective, set, clear, strong, firm)
3
dependable(adjective, close, correct, firm, honest)
3
immovable(adjective, set, firm, solid, still)
3
unswerving(adjective, close, correct, firm, honest)
2
balanced(adjective, direct, smooth, right, flat)
2
reliable(adjective, close, correct, firm, honest)
2
secure(adjective, firm, solid, steady, stable)
2
set in stone(expression, adjective, idiom, firm, solid)
2
sober(adjective, quiet, moderate, severe, firm)
2
unshaken(adjective, set, clear, strong, firm)
1
allegiant(adjective, close, correct, firm, honest)
1
ardent(adjective, close, correct, firm, honest)
1
brick-wall(adjective, firm, solid, steady, substantial)
10 years ago|13k views|share |citing 
APASmart Define. (2015). unchanging thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/unchanging/thesaurus/synonyms
ChicagoSmart Define. 2015. "unchanging thesaurus" https://smartdefine.org/unchanging/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, unchanging thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/unchanging/thesaurus/synonyms>.
MLASmart Define. "unchanging thesaurus" 10 November 2015. Web. 26 September 2026. <https://smartdefine.org/unchanging/thesaurus/synonyms>