Synonyms|178Antonyms|32|Broader|2Narrower|0Related|7

32 entries under firm topic. ×

1
hard as nails(expression, adjective, idiom, tough)
1
implacable(adjective, strong, hard, tough, severe)
1
pertinacious(tough, difficult, determined, awkward)
1
pigheaded(tough, difficult, determined, awkward)
1
resolute(tough, difficult, fixed, rigid)
1
staunch
1
stiff
1
unrelenting(adjective, strong, hard, tough, severe)
0
hardboiled(adjective, tough, immovable, hard-nosed)
0
militant
0
stand pat
0
ungiving
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APASmart Define. (2015). hard-line thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/hard-line/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard-line thesaurus" https://smartdefine.org/hard-line/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, hard-line thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/hard-line/thesaurus/synonyms>.
MLASmart Define. "hard-line thesaurus" 14 April 2015. Web. 28 September 2026. <https://smartdefine.org/hard-line/thesaurus/synonyms>