62 entries under problematic topic. ×

22
unyielding(adjective, appearance, hard, tough, rough)
12
difficult(adjective, tough, obstinate, stubborn)
9
obstreperous(adjective, control, order, tough, resist)
8
stiff(adjective, hard, tough, rough, firm)
4
grim(adjective, appearance, tough, firm, cruel)
3
demanding(adjective, tough, persistent, obstinate)
3
exacting(adjective, tough, persistent, obstinate)
3
problem(adjective, tough, trying)
3
unaccommodating(adjective, tough, grim, trying)
2
thorny(adjective, difficulty)
2
trying(tough, difficulty, grim, troublesome)
1
irritable(tough, grim, restless, obstinate, stubborn)
1
irritating(tough, unpleasant, adverse, unfortunate)
1
knotty(adjective, difficulty)
1
labored(adjective, strong, hard, tough, severe)
1
testing(tough, trying)
1
tiresome(tough, grim, trying, troublesome)
1
troublesome(adjective, tough, unpleasant, grim, adverse)
0
ambitious(tough, trying)
0
arduous(tough, trying, disorderly, unruly)
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APASmart Define. (2015). intractable thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/intractable/thesaurus/synonyms
ChicagoSmart Define. 2015. "intractable thesaurus" https://smartdefine.org/intractable/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, intractable thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/intractable/thesaurus/synonyms>.
MLASmart Define. "intractable thesaurus" 24 June 2015. Web. 20 September 2026. <https://smartdefine.org/intractable/thesaurus/synonyms>