Synonyms|592Antonyms|120|Broader|6Narrower|3Related|303
2
hardheartedness(noun, discipline, firmness, severity, harshness)
2
heart(strength, courage, wind, fortitude, stamina)
2
heartlessness(noun, insensitivity)
2
hoarseness
2
humor
2
immovability(noun, support, control, strength, balance)
2
impenetrability(noun, protection, security, rigidity, hardness)
2
impliability(noun, protection, security, rigidity, hardness)
2
indomitability(noun, resolution)
2
inelasticity(noun, protection, security, rigidity, hardness)
2
inflexibility(noun, determination, firmness, protection, severity)
2
insensitivity(noun, insensitivity)
2
irritability
2
irritation
2
laboriousness(difficulty, hardness)
2
mightiness
2
mood
2
mucilaginousness
2
peevishness
2
pettishness
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APASmart Define. (2015). toughness thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/toughness/thesaurus/synonyms
ChicagoSmart Define. 2015. "toughness thesaurus" https://smartdefine.org/toughness/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, toughness thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/toughness/thesaurus/synonyms>.
MLASmart Define. "toughness thesaurus" 21 December 2015. Web. 26 September 2026. <https://smartdefine.org/toughness/thesaurus/synonyms>