60 entries under hard topic. ×

3
unyielding(adjective, mean, strong, tough)
2
adamant(adjective, strong, tough, sturdy)
2
astringent(adjective, close, strong, tough)
2
flinty(adjective, close, strong, tough)
2
implacable(adjective, mean, strong, tough)
2
rugged(adjective, strong, tough, severe)
2
steely(adjective, strong, tough, severe)
1
adamantine(adjective, strong, tough, sturdy)
1
bitter(adjective, strong, tough, harsh)
1
bullheaded(adjective, strong, tough, severe)
1
by the book(expression, adjective, idiom, strong)
1
disciplinary(adjective, strong, tough, severe)
1
dyed-in-the-wool(adjective, strong, tough, severe)
1
firm(adjective, strong, tough, severe)
1
forbidding(adjective, close, strong, tough)
1
frowning(adjective, strong, tough, severe)
1
hang-tough(adjective, strong, tough, severe)
1
hard-boiled(adjective, strong, tough, severe)
1
hard-core(adjective, strong, tough, severe)
1
hard-line(adjective, strong, tough, severe)
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APASmart Define. (2016). unsparing thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/unsparing/thesaurus/synonyms
ChicagoSmart Define. 2016. "unsparing thesaurus" https://smartdefine.org/unsparing/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, unsparing thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/unsparing/thesaurus/synonyms>.
MLASmart Define. "unsparing thesaurus" 24 March 2016. Web. 28 September 2026. <https://smartdefine.org/unsparing/thesaurus/synonyms>