128 entries under persistent topic. ×

20
fixed(adjective, mean, strong, hard, secure)
18
steadfast(adjective, strong, secure, tough, flat)
16
iron(noun, adjective, mean, strong, hard)
15
implacable(adjective, mean, strong, hard, tough)
15
unshakable(adjective, mean, strong, hard, secure)
14
tenacious(adjective, strong, determined, resolute)
13
mulish(adjective, mean, strong, hard, tough)
12
pigheaded(adjective, mean, hard, tough, deliberate)
12
unwavering(adjective, strong, secure, flat, firm)
11
grim(adjective, mean, strong, hard, tough)
10
perverse(adjective, mean, hard, tough, deliberate)
9
unforgiving(adjective, person, mean, hard, rough)
8
rigorous(adjective, strong, hard, tough, harsh)
8
stiff-necked(adjective, mean, strong, hard, tough)
8
strict(adjective, strong, hard, tough, flat)
7
contrary(adjective, determined, fixed, resolute)
7
harsh(adjective, mean, strong, hard, tough)
7
remorseless(adjective, mean, tough, harsh, resist)
7
resolved(adjective, strong, flat, firm, certain)
7
single-minded(adjective, tough, harsh, cruel, determined)
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APASmart Define. (2016). adamant thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/adamant/thesaurus/synonyms
ChicagoSmart Define. 2016. "adamant thesaurus" https://smartdefine.org/adamant/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, adamant thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/adamant/thesaurus/synonyms>.
MLASmart Define. "adamant thesaurus" 23 March 2016. Web. 23 September 2026. <https://smartdefine.org/adamant/thesaurus/synonyms>