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foolproof

see definition of foolproof
  • adjinfallible
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Synonyms for foolproof

adj infallible
  • flawless
  • reliable
  • sure-fire
  • unassailable
  • goofproof
  • guaranteed
  • perfect
  • tested
  • tried
  • certain
  • dependable
  • fail-safe
  • faultless
  • idiot-proof
  • never-failing
  • safe
  • sure
  • unerring
  • unfailing

More words related to foolproof

fail-safe

adjective. guaranteed not to fail
  • confident
  • covered
  • foolproof
  • protected
  • reliable
  • reliant
  • safeguarded
  • secure
  • sound
  • sure

faultless

adjective. having nothing wrong with it

infallible

adjective. unerring, dependable

perfect

adjective. flawless, superlative

sure-fire

adjective. dependable

surefire

adjective. dependable
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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