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