191 entries under tough topic. ×

2
impervious(adjective, hard, solid, detached)
2
insubordinate(firm, persistent, obstinate, stubborn)
2
perverse(adjective, mean, hard, firm)
2
rebellious(adjective, firm, unreasonable, inflexible)
2
rough(adjective, strong, hard, severe)
2
solidified(adjective, set, hard, firm)
2
titanic(severe, painful, problematic, trying)
2
unflexible(adjective, hard, firm, solid)
2
unmanageable(firm, persistent, obstinate, stubborn)
2
unpermissive(adjective, hard, severe, rough)
2
willful(firm, inflexible, obstinate, stubborn)
1
ambitious(severe, painful, problematic, trying)
1
arduous(adjective, hard, severe, rough)
1
backbreaker(severe, painful, problematic, trying)
1
balky(firm, unreasonable, inflexible, obstinate)
1
bothersome(severe, painful, problematic, trying)
1
bullheaded(adjective, strong, hard, severe)
1
by the book(expression, adjective, idiom, strong, hard)
1
challenging(severe, painful, thorough, demanding)
1
congealed(adjective, set, hard, firm)
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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>