144 entries under tough topic. ×

1
insoluble(difficult, wild, awkward, obstinate)
1
lionhearted(strong, bold, resolute, spirited)
1
locked in(expression, difficult, wild, awkward)
1
martial(strong, bold, resolute, spirited)
1
mighty(adjective, strong, hard, sound)
1
muscular(adjective, strong, sound, fit)
1
ornery(firm, unreasonable, grim, inflexible)
1
reinforced(adjective, strong, sound, solid)
1
remorseless(adjective, firm, unreasonable, grim)
1
spartan(strong, bold, resolute, spirited)
1
stand tall(expression, strong, bold, spirited)
1
stark(adjective, strong, sound, solid)
1
strapping(adjective, strong, hard, sound)
1
unafraid(strong, determined, vigorous, bold)
1
undisciplined(difficult, wild, awkward, obstinate)
1
unpliable(difficult, wild, awkward, obstinate)
1
unreasonable(firm, grim, inflexible, obstinate)
1
untoward(firm, unreasonable, grim, inflexible)
1
valorous(strong, determined, vigorous, bold)
1
venturesome(strong, bold, spirited, brave)
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APASmart Define. (2015). tenacious thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2015, tenacious thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>.
MLASmart Define. "tenacious thesaurus" 6 November 2015. Web. 28 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms>