1
patriotic(adjective, close, correct, firm, honest)
1
permanent
1
perpetual
1
pig-headed(determined, impulsive, stubborn, reckless, impetuous)
1
pigheaded(firm, determined, resolute, impulsive, reckless)
1
pornographic(offensive, dirty, coarse, vulgar, indecent)
1
powerful
1
rash(determined, impulsive, stubborn, reckless, impetuous)
1
reckless(determined, impulsive, stubborn, impetuous)
1
red-hot
1
red hot
1
refractory(firm, determined, impulsive, stubborn, reckless)
1
reliable(adjective, close, correct, honest, true)
1
ribald(coarse, vulgar, indecent, naughty, lewd)
1
rock-ribbed
1
rough(adjective, bad, strong, hard, tough)
1
salacious(coarse, vulgar, indecent, naughty, lewd)
1
scorching
1
scrupulous(adjective, close, correct, firm, honest)
1
scurrilous(coarse, vulgar, indecent, naughty, lewd)
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APASmart Define. (2016). hard-core thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/hard-core/thesaurus/synonyms
ChicagoSmart Define. 2016. "hard-core thesaurus" https://smartdefine.org/hard-core/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, hard-core thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/hard-core/thesaurus/synonyms>.
MLASmart Define. "hard-core thesaurus" 28 March 2016. Web. 23 September 2026. <https://smartdefine.org/hard-core/thesaurus/synonyms>