94 entries under hard topic. ×

56
inflexible(adjective, mean, strong, secure)
55
stubborn(adjective, characteristic, quality, mean, strong)
53
firm(noun, adjective, mean, strong)
45
rigid(adjective, mean, strong, secure)
45
obdurate(adjective, strong, secure, tough)
43
fixed(adjective, move, mean, strong)
43
uncompromising(adjective, mean, secure, determined)
43
unyielding(adjective, mean, strong, secure)
41
determined(adjective, strong, tough, usual)
38
inexorable(adjective, mean, strong, tough)
36
unbending(adjective, mean, strong, tough)
33
unrelenting(adjective, mean, strong, tough)
30
unshakable(adjective, mean, strong, secure)
28
relentless(adjective, mean, strong, tough)
27
adamant(adjective, mean, strong, secure)
27
obstinate(adjective, mean, determined, usual)
17
adamantine(adjective, strong, tough, cruel)
13
hard-nosed(adjective, mean, strong, secure)
12
mulish(adjective, mean, strong, tough)
12
unchangeable(adjective, set, secure, 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>