86 entries under solid topic. ×

53
firm(noun, adjective, mean, strong, hard)
44
resolute(adjective, secure, firm, determined)
43
fixed(adjective, move, mean, strong, hard)
36
set(adjective, strong, secure, firm)
30
unshakable(adjective, mean, strong, hard, secure)
26
steadfast(adjective, move, secure, firm)
18
fast(adjective, strong, secure, firm)
16
unwavering(adjective, secure, firm, determined)
15
stable(adjective, strong, secure, firm)
15
steady(adjective, move, calm, strong, cool)
13
secure(adjective, strong, firm, steady)
12
constant(adjective, secure, firm, determined)
12
immobile(adjective, move, strong, secure)
12
rooted(adjective, strong, secure, usual)
12
unchangeable(adjective, set, hard, secure, firm)
10
set in stone(expression, adjective, idiom, mean, hard)
10
staunch(adjective, set, strong, hard, firm)
9
tenacious(adjective, strong, secure, firm)
7
settled(adjective, strong, secure, firm)
7
unswerving(adjective, firm, intense, determined)
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APASmart Define. (2015). immovable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/immovable/thesaurus/synonyms
ChicagoSmart Define. 2015. "immovable thesaurus" https://smartdefine.org/immovable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, immovable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/immovable/thesaurus/synonyms>.
MLASmart Define. "immovable thesaurus" 3 August 2015. Web. 20 September 2026. <https://smartdefine.org/immovable/thesaurus/synonyms>