Thesaurus.com
Word of the Day
Crossword Solver
Everything After Z
Dictionary.com
Dictionary.com
Thesaurus.com
Try Our Apps
synonyms
Search
definitions
fail-safe
see definition of fail-safe
adj
guaranteed not to fail
Synonyms
for fail-safe
adj
guaranteed not to fail
sound
confident
covered
foolproof
protected
reliable
reliant
safeguarded
secure
sure
More words related to
fail-safe
foolproof
adjective.
infallible
certain
dependable
fail-safe
faultless
flawless
goofproof
guaranteed
idiot-proof
never-failing
perfect
reliable
safe
sure
sure-fire
tested
tried
unassailable
unerring
unfailing
sure-fire
adjective.
dependable
certain
excellent
fail-safe
foolproof
good
infallible
reliable
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
.
