189 entries under adjective topic. ×

1
rough(bad, strong, hard, tough)
1
scrupulous(close, correct, firm, honest)
1
serious(strong, hard, tough, severe)
1
set
1
severe(strong, hard, tough, harsh)
1
sincere(close, correct, firm, honest)
1
standing
1
steady(close, correct, firm, honest)
1
stiff-necked(strong, hard, tough, severe)
1
straight(close, correct, firm, honest)
1
strict(close, strong, hard, tough)
1
string along with(expression, idiom, close, correct)
1
sure(close, correct, firm, honest)
1
timeless
1
tough(strong, hard, severe, firm)
1
tried(close, correct, firm, honest)
1
tried and true(expression, idiom, close, correct)
1
true(close, correct, firm, honest)
1
trustworthy(close, correct, firm, honest)
1
trusty(close, correct, firm, honest)
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APASmart Define. (2016). hard-core thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/hard-core/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-core thesaurus" https://smartdefine.org/hard-core/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, hard-core thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/hard-core/thesaurus/synonyms>.
MLASmart Define. "hard-core thesaurus" 28 March 2016. Web. 25 September 2026. <https://smartdefine.org/hard-core/thesaurus/synonyms>