Synonyms|316Antonyms|26|Broader|0Narrower|0Related|141

57 entries under strong topic. ×

6
unyielding(adjective, hard, tough, firm)
5
rigid(adjective, hard, tough, severe)
4
inflexible(adjective, hard, tough, severe)
3
hard(adjective, tough, severe, firm)
2
adamant(adjective, hard, tough, firm)
2
adamantine(adjective, hard, tough, sturdy)
2
dyed-in-the-wool(adjective, close, hard, tough)
2
firm(adjective, close, hard, tough)
2
flinty(adjective, hard, tough, severe)
2
grim(adjective, hard, tough, severe)
2
immovable(adjective, hard, tough, firm)
2
implacable(adjective, hard, tough, severe)
2
inexorable(adjective, hard, tough, severe)
2
relentless(adjective, hard, tough, severe)
2
rigorous(adjective, hard, tough, severe)
2
steely(adjective, hard, tough, severe)
2
unbending(adjective, hard, tough, firm)
2
unrelenting(adjective, hard, tough, severe)
1
astringent(adjective, hard, tough, severe)
1
austere(adjective, hard, tough, severe)
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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>