2
brisk(adjective, strong, moving, energetic, lively)
2
bulldogged(adjective, tenacious)
2
bullheaded(adjective, resolute, tenacious)
2
decided(adjective, resolute)
2
decisive(adjective, resolute, tenacious)
2
deliberate(adjective, resolute)
2
determined continuous
2
efficient(adjective, work, strain, firmness, labour)
2
fearless(adjective, resolute)
2
fixed
2
headstrong(adjective, resolute, tenacious)
2
hyper(adjective, determined)
2
immovable
2
immutable
2
inexorable(adjective, resolute)
2
inflexible
2
invincible
2
kinetic(adjective, strong, moving, energetic, lively)
2
meticulous
2
moving(adjective, active)
10 years ago|11k views|share |citing 
APASmart Define. (2016). tireless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tireless/thesaurus/synonyms
ChicagoSmart Define. 2016. "tireless thesaurus" https://smartdefine.org/tireless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, tireless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tireless/thesaurus/synonyms>.
MLASmart Define. "tireless thesaurus" 19 February 2016. Web. 24 September 2026. <https://smartdefine.org/tireless/thesaurus/synonyms>