Synonyms|96Antonyms|1|Broader|0Narrower|0Related|0

13 entries under rigid topic. ×

1
bullhead(adjective, mean, hard, tough, harsh)
1
hanging tough(expression, adjective, mean, hard)
1
immovable(adjective, mean, hard, tough, harsh)
1
implacable(adjective, mean, hard, tough, harsh)
1
indurate(adjective, mean, hard, tough, harsh)
1
inexorable(adjective, mean, hard, harsh, stiff)
1
iron(adjective, mean, hard, tough, harsh)
1
set in stone(expression, adjective, idiom, mean, hard)
1
stiff-necked(adjective, mean, hard, tough, harsh)
1
uncooperative(adjective, mean, hard, tough, harsh)
1
unimpressible(adjective, mean, hard, tough, harsh)
1
unshakable(adjective, mean, hard, tough, harsh)
0
hardboiled(adjective, stiff, unfeeling, dogged)
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APASmart Define. (2011). tough nut to crack thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/tough_nut_to_crack/thesaurus/synonyms
ChicagoSmart Define. 2011. "tough nut to crack thesaurus" https://smartdefine.org/tough_nut_to_crack/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2011, tough nut to crack thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/tough_nut_to_crack/thesaurus/synonyms>.
MLASmart Define. "tough nut to crack thesaurus" 23 May 2011. Web. 1 October 2026. <https://smartdefine.org/tough_nut_to_crack/thesaurus/synonyms>