206 entries under strong topic. ×

14
retentive(adjective, unyielding, sticky, retention)
14
unfaltering(adjective, firm, intense, deliberate)
13
indefatigable(adjective, tough, fit, firm)
13
fixed(adjective, sound, secure, tough)
13
resolved(adjective, flat, firm, determined)
12
intransigent(adjective, firm, determined, unreasonable)
12
stiff(adjective, determined, resolute, persistent)
12
tireless(adjective, firm, determined, steady)
11
stalwart(adjective, sound, tough, fit)
11
strong-willed(adjective, firm, intense, deliberate)
11
unflagging(adjective, tough, fit, firm)
10
clinging(adjective, free, firm, resolute)
10
immovable(adjective, secure, firm, solid)
10
indomitable(adjective, tough, firm, difficult)
10
purposeful(adjective, firm, determined, serious)
10
sturdy(adjective, sound, tough, fit)
10
unflinching(adjective, flat, firm, determined)
9
fast(adjective, free, secure, tough)
9
unswerving(adjective, firm, determined, steady)
8
coherent(adjective, unyielding)
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APASmart Define. (2015). tenacious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/tenacious/thesaurus/synonyms
ChicagoSmart Define. 2015. "tenacious thesaurus" https://smartdefine.org/tenacious/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, tenacious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/tenacious/thesaurus/synonyms>.
MLASmart Define. "tenacious thesaurus" 6 November 2015. Web. 23 September 2026. <https://smartdefine.org/tenacious/thesaurus/synonyms>