1
lusty(adjective, strong, moving, lively, active)
1
meek(adjective, calm, quiet, understanding, gentle)
1
mild(adjective, calm, quiet, understanding, gentle)
1
mild-tempered(adjective, calm, quiet, understanding, gentle)
1
never-ending
1
never-tiring
1
obdurate
1
on the go
1
peppy(adjective, strong, moving, energetic, lively)
1
permanent
1
perpetual
1
philosophic(adjective, calm, quiet, gentle, restrained)
1
philosophical(adjective, calm, quiet, understanding, gentle)
1
potent(adjective, strong, moving, energetic, lively)
1
powerful(adjective, strong, moving, energetic, lively)
1
preoccupied
1
purposeful
1
quiet(adjective, calm, understanding, gentle, restrained)
1
rapt
1
red-blooded(adjective, strong, moving, lively, active)
11 years ago|6.1k views|share |citing 
APASmart Define. (2015). untiring thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/untiring/thesaurus/synonyms
ChicagoSmart Define. 2015. "untiring thesaurus" https://smartdefine.org/untiring/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, untiring thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/untiring/thesaurus/synonyms>.
MLASmart Define. "untiring thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/untiring/thesaurus/synonyms>