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

46 entries under stiff topic. ×

1
hardboiled(adjective, tough, determined, serious)
1
hardened(adjective, set, strong, hard, tough)
1
healthy(adjective, strong, hard, solid, heavy)
1
inflexible(adjective, set, strong, hard, tough)
1
rigid(adjective, set, strong, hard, tough)
1
seasoned(adjective, strong, hard, solid)
1
set in stone(expression, adjective, idiom, tough, firm)
1
sinewy(adjective, strong, hard, sound, tough)
1
steeled(adjective, strong, hard, solid)
1
tenacious(adjective, strong, hard, sound, tough)
1
tough as nails(expression, adjective, idiom, strong, hard)
1
unflexible(adjective, tough, firm, distant)
1
unyielding(adjective, strong, hard, sound, tough)
0
cohesive(adjective, strong, hard, solid)
0
fibrous(adjective, strong, hard, solid)
0
fit(adjective, strong, hard, solid)
0
hard-hearted(adjective, cruel, unfeeling, insensitive)
0
indigestible(adjective, strong, hard, solid)
0
indurate(adjective, set, strong, hard)
0
leathery(adjective, strong, hard, solid)
For more, visit Hard_as_nails on Power Thesaurus
11 years ago|1.3k views|share |citing 
APASmart Define. (2015). hard as nails thesaurus. Retrieved September 29, 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 29, 2026).
HarvardSmart Define 2015, hard as nails thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>.
MLASmart Define. "hard as nails thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/hard_as_nails/thesaurus/synonyms>