84 entries under solid topic. ×

1
stout(calm, strong, steady, substantial)
1
substantial(adjective, calm, strong, secure, firm)
1
together(calm, strong, steady, substantial)
1
unquestioning(adjective, set, clear, firm)
1
well-built(calm, strong, steady, substantial)
1
well-founded(calm, strong, steady, substantial)
0
allegiant(adjective, firm, stable, fixed)
0
ardent(adjective, firm, stable, fixed)
0
cool(adjective, firm, stable, fixed)
0
dependable(adjective, firm, stable, fixed)
0
imperturbable(adjective, firm, stable, fixed)
0
intense(adjective, firm, stable, fixed)
0
levelheaded(adjective, firm, stable, fixed)
0
liege(adjective, firm, stable, fixed)
0
patterned(adjective, firm, stable, fixed)
0
reserved(adjective, firm, stable, fixed)
0
sedate(adjective, firm, stable, fixed)
0
self-possessed(adjective, firm, stable, fixed)
0
sensible(adjective, firm, stable, fixed)
0
serene(adjective, firm, stable, fixed)
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APASmart Define. (2015). unchangeable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unchangeable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unchangeable thesaurus" https://smartdefine.org/unchangeable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unchangeable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unchangeable/thesaurus/synonyms>.
MLASmart Define. "unchangeable thesaurus" 3 August 2015. Web. 23 September 2026. <https://smartdefine.org/unchangeable/thesaurus/synonyms>