Synonyms|300Antonyms|107|Broader|6Narrower|1Related|829
1
delicate
1
effectual(adjective, dependable, unerring)
1
even
1
express
1
fine
1
fixed(clear, certain, valid, unquestionable, undisputable)
1
fleckless(perfect, precise, flawless, faultless, exquisite)
1
genuine(clear, complete, certain, sure, valid)
1
incorrupt(perfect, precise, flawless, faultless, exquisite)
1
indefectible
1
indefective
1
indubitable(clear, complete, certain, sure, valid)
1
infallibly
1
invariable
1
irreproachable
1
just right
1
mathematical
1
micrometrically precise
1
microscopic
1
never-failing(adjective, certain, flawless, reliable, trustworthy)
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APASmart Define. (2015). infallible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/infallible/thesaurus/synonyms
ChicagoSmart Define. 2015. "infallible thesaurus" https://smartdefine.org/infallible/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, infallible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/infallible/thesaurus/synonyms>.
MLASmart Define. "infallible thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/infallible/thesaurus/synonyms>