108 entries under tough topic. ×

2
disciplinary(adjective, strong, hard, severe)
2
flinty(adjective, strong, hard, severe)
2
grievous(adjective, hard, severe, difficult)
2
hard-core(adjective, close, strong, hard)
2
implacable(adjective, set, strong, hard)
2
steely(adjective, set, strong, hard)
1
bitter(adjective, strong, hard, severe)
1
aloof(fair, pure, fixed, rigid)
1
arduous(adjective, hard, severe, rough)
1
bullheaded(adjective, strong, hard, severe)
1
hang-tough(adjective, strong, hard, harsh)
1
hard as nails(expression, adjective, idiom, severe)
1
hardheaded(adjective, strong, hard, severe)
1
headstrong(adjective, hard, severe, rough)
1
heavy(adjective, strong, hard, severe)
1
intemperate(adjective, hard, severe, rough)
1
reserved(adjective, firm, fixed, stiff)
1
thick-skinned(adjective, harsh, cruel, grim)
1
trying(adjective, hard, difficult, harsh)
1
unpleasant(adjective, severe, harsh, cruel)
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APASmart Define. (2015). strict thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/strict/thesaurus/synonyms
ChicagoSmart Define. 2015. "strict thesaurus" https://smartdefine.org/strict/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, strict thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/strict/thesaurus/synonyms>.
MLASmart Define. "strict thesaurus" 3 August 2015. Web. 27 September 2026. <https://smartdefine.org/strict/thesaurus/synonyms>