86 entries under solid topic. ×

6
anchored(adjective, strong, secure, steady)
6
iron(adjective, mean, strong, hard, tough)
6
loyal(adjective, firm, intense, true)
6
stabile(adjective, firm, still, stable)
5
imperturbable(adjective, calm, cool, firm)
4
calm(adjective, cool, firm, still)
4
cool(adjective, calm, firm, steady)
4
equable(adjective, firm, stable, fixed)
4
unfaltering(adjective, firm, stable, fixed)
4
unshaken(adjective, firm, stable, fixed)
3
changeless(adjective, set, firm, still)
3
durable(adjective, strong, secure, firm)
3
sedate(adjective, calm, cool, firm)
3
strong(adjective, hard, secure, tough)
3
tight(adjective, strong, secure, firm)
3
unchanging(adjective, set, firm, still)
2
balanced(adjective, firm, stable, fixed)
2
dependable(adjective, firm, stable, fixed)
2
fastened(adjective, strong, secure, firm)
2
serene(adjective, calm, cool, firm)
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APASmart Define. (2015). immovable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/immovable/thesaurus/synonyms
ChicagoSmart Define. 2015. "immovable thesaurus" https://smartdefine.org/immovable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, immovable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/immovable/thesaurus/synonyms>.
MLASmart Define. "immovable thesaurus" 3 August 2015. Web. 21 September 2026. <https://smartdefine.org/immovable/thesaurus/synonyms>