455 entries under adjective topic. ×

6
uncompromising(tough, firm, deliberate, determined)
6
uniform(steady, regular, even, constant)
6
urgent
5
bulldogged(determined, tenacious)
5
contumacious(tough, firm, determined, obstinate)
5
definite(strong, firm, certain, unyielding)
5
deliberate(intense, determined, resolute, intentional)
5
even(steady, regular, constant, uniform)
5
fearless
5
monotonous(common, regular, normal, constant)
5
never-ending(determined, steady, regular, even)
5
ongoing
5
perdurable(continue, sturdy, constant, enduring)
5
protracted(continue, continuous, lasting, continuing)
5
recalcitrant(tough, firm, obstinate, stubborn)
5
solid(strong, tough, firm, certain)
5
spunky(resolute, tenacious)
5
strong-minded(firm, determined, fixed, serious)
5
thorough
5
unbending(strong, tough, severe, flat)
11 years ago|29k views|share |citing 
APASmart Define. (2015). persistent thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/persistent/thesaurus/synonyms
ChicagoSmart Define. 2015. "persistent thesaurus" https://smartdefine.org/persistent/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, persistent thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/persistent/thesaurus/synonyms>.
MLASmart Define. "persistent thesaurus" 1 June 2015. Web. 21 September 2026. <https://smartdefine.org/persistent/thesaurus/synonyms>