Thesaurus / failsafe
FEEDBACK- flawless
- reliable
- surefire
- unassailable
- goofproof
- guaranteed
- perfect
- tested
- tried
- certain
- dependable
- fail-safe
- faultless
- idiot-proof
- never-failing
- safe
- sure
- unerring
- unfailing
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.