42 entries under severe topic. ×

1
flinty(adjective, strong, hard, tough)
1
forbidding(adjective, strong, hard, tough)
1
frowning(adjective, strong, hard, tough)
1
grim(adjective, strong, hard, tough)
1
hang-tough(adjective, strong, hard, tough)
1
hard(adjective, strong, tough, rough)
1
hard-core(adjective, strong, hard, tough)
1
hardheaded(adjective, strong, hard, tough)
1
harsh(adjective, strong, hard, tough)
1
headstrong(adjective, hard, tough, rough)
1
implacable(adjective, strong, hard, tough)
1
incompliant(tough, difficult, wild, awkward)
1
intransigent(determined, hostile, stiff, inflexible)
1
locked in(expression, tough, difficult, stiff)
1
mortified(adjective, strong, hard, tough)
1
mulish(adjective, strong, hard, tough)
1
rigorous(adjective, strong, hard, tough)
1
serious(adjective, strong, hard, tough)
1
steely(adjective, strong, hard, tough)
1
stiff-necked(adjective, strong, hard, tough)
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 27 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>