50 entries under grim topic. ×

31
refractory(adjective, control, order, tough, difficulty)
28
unmanageable(adjective, control, order, hard, tough)
26
inflexible(adjective, strong, hard, tough, rough)
22
headstrong(adjective, strong, hard, tough, rough)
22
unyielding(adjective, appearance, hard, tough, rough)
14
dogged(adjective, appearance, tough, firm, terrible)
12
mulish(adjective, tough, firm, difficult, indifferent)
12
unbending(adjective, hard, tough, rough, firm)
11
pigheaded(adjective, tough, firm, deliberate, determined)
10
tough(adjective, hard, rough, firm, difficult)
9
implacable(adjective, hard, tough, firm, cruel)
9
obstreperous(adjective, control, order, tough, resist)
9
willful(adjective, tough, firm, difficult, violent)
8
pertinacious(adjective, strong, tough, firm, difficult)
8
stiff(adjective, hard, tough, rough, firm)
7
inexorable(adjective, appearance, tough, firm, violent)
6
relentless(adjective, appearance, strong, tough, firm)
6
stiff-necked(adjective, tough, firm, stupid, unreasonable)
6
uncompliant(adjective, tough, firm, unreasonable, irritable)
6
unrelenting(adjective, appearance, strong, tough, firm)
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APASmart Define. (2015). intractable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/intractable/thesaurus/synonyms
ChicagoSmart Define. 2015. "intractable thesaurus" https://smartdefine.org/intractable/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, intractable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/intractable/thesaurus/synonyms>.
MLASmart Define. "intractable thesaurus" 24 June 2015. Web. 21 September 2026. <https://smartdefine.org/intractable/thesaurus/synonyms>