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Unfailable vs Foolproof - What's the difference?

unfailable | foolproof |

As adjectives the difference between unfailable and foolproof

is that unfailable is infallible while foolproof is for a device: protected, or designed to be proof against misuse or error; fail-safe.

As a verb foolproof is

to make foolproof.

unfailable

English

Adjective

(en adjective)
  • infallible
  • * Bishop Joseph Hall
    • If then we believe this unfailable word of truth, who would not be content to mourn awhile, that he may rejoice for ever?
    (Webster 1913)

    foolproof

    English

    Adjective

    (en adjective)
  • For a device: protected, or designed to be proof against misuse or error; fail-safe.
  • For an idea or plan: infallible, or bulletproof.

    • Verb

    (en verb)
  • To make foolproof.