116 entries under tough topic. ×

1
bothersome(severe, painful, problematic, trying)
1
close-grained(hard, solid, rigid, inflexible)
1
crucial(severe, painful, problematic, trying)
1
difficile(severe, painful, problematic, trying)
1
easier said than done(expression, severe, painful, problematic)
1
fastidious(particular, problematic, trying, fussy)
1
fine-grained(hard, solid, rigid, inflexible)
1
galling(severe, painful, problematic, trying)
1
gargantuan(severe, painful, problematic, trying)
1
gooey(heavy, thick, dense, concentrated)
1
hard-won(severe, painful, problematic, trying)
1
hard as nails(expression, adjective, idiom, set, strong)
1
immense(severe, painful, problematic, trying)
1
irritating(severe, painful, problematic, trying)
1
no picnic(expression, severe, painful, problematic)
1
nonporous(hard, solid, rigid, inflexible)
1
not easy(expression, severe, painful, problematic)
1
operose(severe, difficult, painful, problematic)
1
picky(severe, harsh, rigid, tight)
1
problem(severe, painful, problematic, trying)
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APASmart Define. (2015). stiff thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/stiff/thesaurus/synonyms
ChicagoSmart Define. 2015. "stiff thesaurus" https://smartdefine.org/stiff/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, stiff thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/stiff/thesaurus/synonyms>.
MLASmart Define. "stiff thesaurus" 24 December 2015. Web. 28 September 2026. <https://smartdefine.org/stiff/thesaurus/synonyms>