79 entries under hard topic. ×

42
unshakable(adjective, characteristic, quality, mean, strong)
37
mulish(adjective, obstinate, characteristic, quality, stubbornness)
33
intractable(adjective, characteristic, quality, stubbornness, obstinate)
33
tough(adjective, characteristic, quality, mean, strong)
29
pigheaded(adjective, characteristic, quality, mean)
22
perverse(adjective, characteristic, quality, stubbornness, mean)
22
uncooperative(adjective, change, mean, position, attitude)
21
stiff-necked(adjective, characteristic, quality, stubbornness, determined)
21
hardheaded(adjective, characteristic, quality, strong)
21
rugged(adjective, strong, tough, difficulty)
20
laborious(adjective, difficult, complex)
20
impossible(adjective, difficulty, difficult, complex)
20
serious(adjective, strong, tough, firm)
20
tight(adjective, difficult, complex, rigid)
19
severe(adjective, appearance, strong, tough)
19
cruel(adjective, appearance, strong, tough)
19
grim(adjective, characteristic, appearance, quality, strong)
19
sticky(adjective, difficult, complex)
19
implacable(adjective, characteristic, appearance, quality, mean)
19
intricate(adjective, difficulty, difficult, complex)
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APASmart Define. (2015). stubborn thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/stubborn/thesaurus/synonyms
ChicagoSmart Define. 2015. "stubborn thesaurus" https://smartdefine.org/stubborn/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, stubborn thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/stubborn/thesaurus/synonyms>.
MLASmart Define. "stubborn thesaurus" 3 August 2015. Web. 26 September 2026. <https://smartdefine.org/stubborn/thesaurus/synonyms>