Find Synonyms

infallible Synonyms

Another word for infallible

Choosing another word for infallible depends on context, so the 11 synonyms and similar words below are separated across 2 exact definitions and ranked by match strength.
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• adjective (Context 1)

Incapable of making mistakes or being wrong.

Usage Example

"Even the most experienced doctors are not unerring and occasionally seek a second opinion."

Strongest
unerring
errorless
Strong
unfailing
flawless
faultless
impeccable

• adjective (Context 2)

Never failing; always effective or reliable.

Usage Example

"She had an foolproof sense of direction that guided the hiking group safely through the dense fog."

Strongest
foolproof
surefire
unfailing
Strong
dependable
reliable
certain

Opposites of infallible

The opposite of infallible shifts depending on context. Common opposites include:

fallible
unreliable
ineffective
imperfect
errant
uncertain
flawed
dubious
See all opposites of infallible

• Nearby Words

inextinguishable
inextricably
infallibility
infallible
infallibly
infamous
infamously

Cite this Entry

Wordmom. (2026). Synonyms for Infallible. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/infallible
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