Incapable of error; never wrong
Free from error
That cannot be doubted, questioned, or disputed; absolutely true; certain
The definition of dependable is someone or something who is reliable and trustworthy or who can be counted on.
The definition of excellent is someone or something as exceptional or of high quality.
(Signal processing, of a communication protocol) Such that either a sent packet will reach its destination, even if it requires retransmission, or the sender will be told that it didn't
Incapable of error; infallible.
Capable of being relied on; dependable:
Able to be depended on for the discharge of obligations incurred; of unimpaired credit.
Find another word for sure-fire. In this page you can discover 12 synonyms, antonyms, idiomatic expressions, and related words for sure-fire, like: infallible, unerring, sure, dependable, excellent, reliable, unfailing, certain, dead-cert, surefire and good.