Synonyms|428Antonyms|86|Broader|9Narrower|0Related|95
2
tough(adjective, strong, sound, fit, firm)
2
trusty(adjective, trustworthy, faithful)
2
unchangeable
2
unconquerable
2
undivided(adjective, whole)
2
undrooping
2
uninterrupted
2
unrelieved
2
unshakable
2
unsleeping
2
unstoppable
2
unyielding
2
vital(adjective, strong, tough, fit, lively)
1
absolute
1
adamant
1
aeonian
1
aggressive(adjective, strong, moving, lively, active)
1
animated(adjective, strong, moving, lively, active)
1
anticipating(cheerful, optimistic, rosy, expectant)
1
anticipative(cheerful, optimistic, rosy, expectant)
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APASmart Define. (2015). unflagging thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/unflagging/thesaurus/synonyms
ChicagoSmart Define. 2015. "unflagging thesaurus" https://smartdefine.org/unflagging/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, unflagging thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/unflagging/thesaurus/synonyms>.
MLASmart Define. "unflagging thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/unflagging/thesaurus/synonyms>