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Infallible synonyms
ĭn-făl'ə-bəl
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Bound to be successful or perform as expected:
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  1. Bound to be successful or perform as expected:
Free from error
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  1. Free from error
  2. Committing no mistakes; consistently accurate.
  3. Not missing or failing; certain; sure; exact
Characterized by strict adherence to standards or rules:
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  1. Characterized by strict adherence to standards or rules:
  2. Characterized by accurate measurements or inferences with small margins of error; not approximate:
  3. Strictly and completely in accord with fact; not deviating from truth or reality:
Completely correct or accurate; exact; precise
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  1. Completely correct or accurate; exact; precise
  2. In a condition of complete excellence, as in skill or quantity; faultless; most excellent; sometimes used comparatively
  3. Complete; thorough; utter:
Never ceasing or falling short; inexhaustible
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  1. Never ceasing or falling short; inexhaustible
  2. Always reliable; certain
  3. Always able to supply more; inexhaustible:
Without fault; free from defect or error.
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  1. Without fault; free from defect or error.
  2. Without any fault or defect; perfect
That will not fail; always effective
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  1. That will not fail; always effective
  2. That cannot be doubted, questioned, or disputed; absolutely true; certain
  3. Impossible to doubt or dispute; certain:
Capable of being relied on; dependable:
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  1. Capable of being relied on; dependable:
  2. Suitable or fit to be relied on; worthy of dependence or reliance; trustworthy
  3. (Signal processing, of a communication protocol) Such that either a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didn't
Trustworthy.
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  1. Trustworthy.
  2. That can be depended on; trustworthy; reliable
  3. Able, or easily able to be depended on.
Worthy of trust; dependable; reliable
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  1. Worthy of trust; dependable; reliable
Beyond question or doubt.
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  1. Beyond question or doubt.
  2. Not to be questioned, doubted, or disputed; certain
  3. Undeniable, obvious
Exact; accurate; right; correct
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  1. Exact; accurate; right; correct
  2. Quick and exact in sensing and responding:
  3. Exactly conforming to a rule, standard, or pattern:
Highly accurate or definitive; treated or worthy of treatment as a scholarly authority
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  1. Highly accurate or definitive; treated or worthy of treatment as a scholarly authority
  2. Based on competent authority; reliable because coming from one who is an expert or properly qualified
  3. Having a commanding style.
Very confident; certain:
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  1. Very confident; certain:
  2. That has, or is considered as having, real existence in itself, not just in the absence of other attributes
  3. Concerned only with real things and experience; empirical; practical
Impossible to refute or disprove; incontrovertible:
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  1. Impossible to refute or disprove; incontrovertible:
  2. That cannot be refuted or disproved
That can clearly be shown or proved; absolutely certain or necessarily true
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  1. That can clearly be shown or proved; absolutely certain or necessarily true
  2. Necessarily or demonstrably true; incontrovertible.
That cannot be controverted; not disputable or debatable; undeniable
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  1. That cannot be controverted; not disputable or debatable; undeniable
  2. Impossible to dispute; unquestionable:
Capable of compensating automatically and safely for a failure, as of a mechanism or power source.
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  1. Capable of compensating automatically and safely for a failure, as of a mechanism or power source.
  2. Designating, of, or involving a procedure designed to prevent malfunctioning or unintentional operation, often specif. of nuclear-armed aircraft, through an intricate system of protective devices
  3. Guaranteed not to fail:
Bound to be successful or perform as expected:
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  1. Bound to be successful or perform as expected:
Having or showing confidence; assured:
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  1. Having or showing confidence; assured:
  2. Capable of being relied on; dependable:
  3. Sure (to happen, etc.); inevitable
Reliable; dependable:
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  1. Reliable; dependable:
  2. Not likely to fail or give way; stable:
  3. Reliable; dependable
(Obs.) Secure or safe
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  1. (Obs.) Secure or safe
  2. That cannot be doubted, questioned, or disputed; absolutely true; certain
  3. Impossible to doubt or dispute; certain:
Free from error
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  1. Free from error
  2. Committing no mistakes; consistently accurate.
  3. Not missing or failing; certain; sure; exact
Never ceasing or falling short; inexhaustible
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  1. Never ceasing or falling short; inexhaustible
  2. Always able to supply more; inexhaustible:
  3. Always reliable; certain
Find another word for infallible. In this page you can discover 30 synonyms, antonyms, idiomatic expressions, and related words for infallible, like: sure-fire, unerring, exact, perfect, unfailing, faultless, sure, reliable, dependable, trustworthy and unquestionable.