Synonyms|300Antonyms|107|Broader|6Narrower|1Related|829

76 entries under adjective topic. ×

2
guaranteed(clear, certain, flawless, valid)
2
incontestable(certain, unquestionable, undisputable)
2
inevitable(certain, unquestionable, undisputable)
2
omniscient(dependable, unerring)
2
oracular
2
right(precise, accurate)
2
stable
2
tried
2
unbeatable(dependable, unerring)
2
undeceivable(dependable, unerring)
2
unmistaken
1
apodictic(dependable, unerring)
1
authoritative(dependable, unerring)
1
believable
1
credible
1
effectual(dependable, unerring)
1
never-failing(certain, flawless, reliable, trustworthy)
1
predictable
1
principled
1
responsible
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APASmart Define. (2015). infallible thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/infallible/thesaurus/synonyms
ChicagoSmart Define. 2015. "infallible thesaurus" https://smartdefine.org/infallible/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, infallible thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/infallible/thesaurus/synonyms>.
MLASmart Define. "infallible thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/infallible/thesaurus/synonyms>