Synonyms|404Antonyms|106|Broader|1Narrower|0Related|115

68 entries under solid topic. ×

1
rigid(adjective, set, strong, hard, tough)
1
seasoned(adjective, strong, hard, stiff)
1
secure(adjective, strong, sound, tough)
1
sinewy(adjective, strong, hard, sound, tough)
1
sound(adjective, strong, tough, heavy)
1
stable(adjective, strong, sound, tough)
1
stark(adjective, strong, sound, tough)
1
staunch(adjective, strong, sound, tough)
1
steady(adjective, calm, strong, cool, sound)
1
steeled(adjective, strong, hard, stiff)
1
stiff(adjective, set, strong, hard, tough)
1
substantial(adjective, strong, sound, tough)
1
tenacious(adjective, strong, hard, sound, tough)
1
unyielding(adjective, strong, hard, sound, tough)
1
well-built(adjective, strong, sound, tough)
1
well-founded(adjective, strong, sound, tough)
1
well-made(adjective, strong, sound, tough)
0
adamantine(adjective, set, strong, hard, tough)
0
cohesive(adjective, strong, hard, stiff)
0
fibrous(adjective, strong, hard, stiff)
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APASmart Define. (2015). hard as nails thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/hard_as_nails/thesaurus/synonyms
ChicagoSmart Define. 2015. "hard as nails thesaurus" https://smartdefine.org/hard_as_nails/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, hard as nails thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>.
MLASmart Define. "hard as nails thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>