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

68 entries under solid topic. ×

1
able-bodied(adjective, strong, sound, tough)
1
active(adjective, strong, sound, tough)
1
athletic(adjective, strong, sound, tough)
1
big(adjective, strong, sound, tough)
1
brawny(adjective, strong, hard, powerful)
1
capable(adjective, strong, sound, tough)
1
conditioned(adjective, strong, hard, stiff)
1
durable(adjective, strong, hard, sound, tough)
1
enduring(adjective, strong, sound, tough)
1
energetic(adjective, strong, sound, tough)
1
fixed(adjective, strong, sound, tough)
1
hardened(adjective, set, strong, hard, tough)
1
healthy(adjective, strong, hard, heavy)
1
heavy(adjective, strong, hard, sound, tough)
1
heavy-duty(adjective, strong, sound, tough)
1
impenetrable(adjective, set, strong, hard, firm)
1
in fine feather(expression, adjective, idiom, strong, sound)
1
inflexible(adjective, set, strong, hard, tough)
1
muscular(adjective, strong, sound, tough)
1
reinforced(adjective, strong, sound, tough)
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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>