1
breezy(adjective, strong, moving, lively, active)
1
continued(adjective, strong, firm, determined, steady)
1
continuous
1
daring
1
dead set on
1
demoniac(adjective, strong, moving, lively, active)
1
dependable
1
eager beaver(expression, adjective, strong, firm, determined)
1
fireball(adjective, strong, firm, determined, steady)
1
flintlike(adjective, tenacious)
1
forcible(adjective, strong, moving, lively, active)
1
full of beans(expression, adjective, idiom, active, peppy)
1
full of pep(expression, adjective, idiom, strong, speedy)
1
go-go(adjective, strong, firm, determined, steady)
1
gumptious
1
hardy(adjective, strong, moving, lively, active)
1
hell-bent
1
high-powered(adjective, strong, moving, energetic, lively)
1
implacable(adjective, resolute)
1
in for long haul
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>