191 entries under tough topic. ×

1
unaccommodating(adjective, difficult, awkward, grim)
1
unreasonable(firm, inflexible, obstinate, stubborn)
1
untoward(firm, unreasonable, inflexible, obstinate)
1
upstream(severe, painful, problematic, trying)
1
wearisome(severe, painful, problematic, trying)
0
uphill(adjective, severe, painful, problematic)
0
argumentative(grim, problematic, trying, troublesome)
0
bearish(grim, problematic, trying, troublesome)
0
boorish(grim, problematic, trying, troublesome)
0
close-grained(hard, solid, inflexible)
0
ferric(adjective, strong, hard, sturdy)
0
ferrous(adjective, strong, hard, sturdy)
0
fine-grained(hard, solid, inflexible)
0
fractious(grim, problematic, trying, troublesome)
0
grueling(problematic, trying)
0
hard to please(expression, idiom, grim, problematic)
0
impolite(grim, problematic, trying, troublesome)
0
insensible(adjective, strong, hard, sturdy)
0
ironfisted(adjective, pitiless, scrupulous, merciless)
0
irritable(grim, problematic, trying, troublesome)
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APASmart Define. (2015). rigid thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/rigid/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigid thesaurus" https://smartdefine.org/rigid/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, rigid thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/rigid/thesaurus/synonyms>.
MLASmart Define. "rigid thesaurus" 3 August 2015. Web. 29 September 2026. <https://smartdefine.org/rigid/thesaurus/synonyms>