144 entries under tough topic. ×

1
big(adjective, strong, sound, solid)
1
capable(adjective, strong, sound, fit)
1
cool(strong, bold, resolute, spirited)
1
daredevil(strong, bold, resolute, spirited)
1
daring(strong, determined, vigorous, bold)
1
difficult(wild, awkward, obstinate, stubborn)
1
doughty(strong, bold, resolute, spirited)
1
fiery(strong, bold, resolute, spirited)
1
fire-eating(strong, bold, spirited, brave)
1
forcible(adjective, strong, sound, solid)
1
gallant(strong, bold, resolute, spirited)
1
hard as nails(expression, adjective, idiom, strong, sound)
1
healthy(adjective, strong, hard, sound)
1
heavy-duty(adjective, strong, sound, solid)
1
heroic(strong, bold, resolute, spirited)
1
high-spirited(strong, bold, resolute, spirited)
1
impavid(strong, bold, resolute, spirited)
1
in fine feather(expression, adjective, idiom, strong, sound)
1
incurable(difficult, wild, awkward, persistent)
1
indocile(difficult, wild, awkward, obstinate)
10 years ago|22k views|share |citing 
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>