Synonyms|374Antonyms|68|Broader|6Narrower|0Related|45

255 entries under adjective topic. ×

1
habitual
1
hardy(strong, tough, fit, lively)
1
hell-bent
1
high-powered(strong, moving, lively, active)
1
homogeneous
1
intense
1
intrepid
1
invariable
1
iron-willed
1
ironclad
1
keen
1
level
1
lusty(strong, sound, tough, fit)
1
meticulous
1
mettlesome
1
monolithic
1
nonstop
1
nose to grindstone
1
perennial
1
potent(strong, tough, fit, lively)
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APASmart Define. (2015). indefatigable thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/indefatigable/thesaurus/synonyms
ChicagoSmart Define. 2015. "indefatigable thesaurus" https://smartdefine.org/indefatigable/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, indefatigable thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/indefatigable/thesaurus/synonyms>.
MLASmart Define. "indefatigable thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/indefatigable/thesaurus/synonyms>