395 entries under adjective topic. ×

6
devoted(strong, firm, determined, steady)
6
dour
6
durable(strong, sound, secure, tough)
6
earnest(serious, resolute, persistent, unwavering)
6
faithful(firm, true, fixed, resolute)
6
hard-nosed(determined, resolute, obstinate, uncompromising)
6
hardy(strong, sound, tough, solid)
6
intractable(tough, firm, difficult, persistent)
6
long
6
mucilaginous(sticky, viscous)
6
persisting(strong, firm, determined, resolute)
6
stiff-necked(tough, firm, resist, unreasonable)
6
unbending(clear, strong, tough, severe)
6
undaunted(strong, tough, firm, steady)
5
bigoted(determined, resolute, obstinate, uncompromising)
5
bound(strong, flat, firm, solid)
5
bovine(determined, resolute, obstinate, uncompromising)
5
bull-headed(determined, resolute, obstinate, stubborn)
5
bulldogged
5
dauntless(strong, tough, vigorous, bold)
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APASmart Define. (2015). tenacious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, tenacious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>.
MLASmart Define. "tenacious thesaurus" 6 November 2015. Web. 24 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms>