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

EXAMPLES FROM THE WEB FOR FAIL-SAFE

Internally, the communications beam to Thule Base had been interrupted; and the fail-safe had not failed-safely.

MORE RELATED WORDS FOR FAIL-SAFE

foolproof

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