Synonyms & related words for infallible

Find synonyms, related words, and the definition of infallible — including inerrable, unerring, inerrant, foolproof, indefectible, faultless. Dendril is a free visual thesaurus that shows them on an interactive map where stronger matches sit closer to the center — no signup, no ads.

Words related to infallible

Explore words related to infallible — words associated with it, words that go with it, and its nearest matches in meaning. Related words include infallibleness, infallibility, infallibly, fallible, fallibly, infallibilism, fallibility, inerrancy. Click any word to make it the center of the map and keep exploring the web of connections.

Synonyms for infallible

Common synonyms for infallible include inerrable, unerring, inerrant, foolproof, indefectible, faultless, unfailing, surefire — words that share a close meaning. Hover or tap any word on the map for its definition and part of speech.

Where does infallible come from?

The word infallible breaks down into one root of Latin origin: the root fall-, from Latin fallo (“deceive”). Explore each root to see other English words built from the same source.