73 entries under inflexible topic. ×

3
unadaptable(adjective, hard, resolute, rigid)
2
aloof(adjective, fixed, rigid, obdurate)
2
cantankerous(adjective, tough, firm, determined, unreasonable)
2
constant(adjective, strong, secure, flat, firm)
2
dead set on(expression, adjective, idiom, strong, secure)
2
hard-line(adjective, strong, hard, tough, rough)
2
impassive(adjective, cold, indifferent, steady, fixed)
2
indomitable(adjective, strong, hard, tough, determined)
2
insensitive(adjective, difficult, cold, indifferent, troubled)
2
rebellious(adjective, tough, firm, unreasonable, grim)
2
rugged(adjective, strong, hard, tough, sturdy)
2
unemotional(adjective, mean, hard, harsh, cold)
1
arbitrary(adjective, hard, severe, rough, harsh)
1
assertive(adjective, firm, persistent, positive)
1
balky(adjective, tough, firm, unreasonable, grim)
1
cussed(tough, firm, unreasonable, grim)
1
dogmatic(determined, fixed, rigid, stubborn)
1
fast(adjective, strong, secure, tough, firm)
1
locked in(expression, determined, fixed, impassive)
1
ornery(tough, firm, unreasonable, grim)
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APASmart Define. (2016). adamant thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/adamant/thesaurus/synonyms
ChicagoSmart Define. 2016. "adamant thesaurus" https://smartdefine.org/adamant/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2016, adamant thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/adamant/thesaurus/synonyms>.
MLASmart Define. "adamant thesaurus" 23 March 2016. Web. 1 October 2026. <https://smartdefine.org/adamant/thesaurus/synonyms>