What is another word for failsafe?

Need synonyms for failsafe? Here's a list of similar words from our thesaurus that you can use instead.

(tried and true/tested) Tested, hence, proven to be firm or reliable
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Accurate, authentic or authoritative in nature
Able to be relied on or trusted
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Switching to redundant system in the event of failure of main
“I wheeled out my failsafe conversational gambit which is to ask Mel to take me through the difference between creme fraiche, fromage frais and sour cream.”
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