136 entries under tough topic. ×

2
steely(adjective, strong, hard, severe)
2
strenuous(adjective, rough, difficult, harsh)
2
thick-skinned(adjective, harsh, grim, painful)
1
adamantine(adjective, strong, hard, sturdy)
1
arduous(adjective, rough, difficult, harsh)
1
backbreaking(adjective, rough, difficult, heavy)
1
bitter(adjective, strong, hard, harsh)
1
bullheaded(adjective, strong, hard, severe)
1
by the book(expression, adjective, idiom, strong, hard)
1
cold-blooded(adjective, harsh, cruel, grim)
1
complicated(adjective, rough, difficult, heavy)
1
difficile(adjective, rough, difficult, heavy)
1
disciplinary(adjective, strong, hard, severe)
1
distressing(adjective, severe, rough, difficult)
1
dyed-in-the-wool(adjective, strong, hard, severe)
1
effortful(adjective, rough, difficult, harsh)
1
fatiguing(adjective, rough, difficult, heavy)
1
firm(adjective, strong, hard, severe)
1
forbidding(adjective, close, strong, hard)
1
frowning(adjective, strong, hard, severe)
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APASmart Define. (2016). unsparing thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/unsparing/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsparing thesaurus" https://smartdefine.org/unsparing/thesaurus/synonyms (accessed September 30, 2026).
HarvardSmart Define 2016, unsparing thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/unsparing/thesaurus/synonyms>.
MLASmart Define. "unsparing thesaurus" 24 March 2016. Web. 30 September 2026. <https://smartdefine.org/unsparing/thesaurus/synonyms>