Part of speech:
Giving safety; reducing danger or harm
For use during emergencies:
Designed so as to be impervious to human incompetence, error, or misuse:
Find another word for fail-safe. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for fail-safe, like: safety, emergency, safeguarding, foolproof, trouble-free, , guaranteed, protective, reliable, foolproof and thrive.