Difference between Reliable and Certain

RELIABLE vs CERTAIN: NOUN

A certain number or quantity.
In the Roman Catholic Church, prayers said daily at mass for specified persons, as for the members of a guild unable to keep a priest of its own, but who paid so much to a church to have a daily remembrance. Also certainty.
Certainty.
A definite but unstated quantity.

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
Suitable or fit to be relied on; worthy of dependance or reliance; trustworthy.
Worthy of reliance or trust
Yielding the same or compatible results in different clinical experiments or statistical trials.
Capable of being relied on; dependable.
Worthy of being depended on
Conforming to fact and therefore worthy of belief

Perceptible; noticeable.
Named but not known or previously mentioned.
Not specified or identified but assumed to be known.
Having or showing confidence; assured.
Capable of being relied on; dependable.
Established beyond doubt or question; indisputable.
Sure to come or happen; inevitable.
Definite; fixed.
Capable of being depended on
Certain to occur; destined or inevitable
Exercising or taking care great enough to bring assurance
Established irrevocably
Unfailing; infallible.
Definite but not specified or identified
Having or feeling no doubt or uncertainty; confident and assured
Reliable in operation or effect
Sure, positive, not doubting.
Assuredly.
Not specifically named; indeterminate; indefinite; one or some; -- sometimes used independenty as a noun, and meaning certain persons.
Fixed or stated; regular; determinate.
Not great; calculable.
Actually existing; sure to happen; inevitable.
Not to be doubted or denied; established as a fact.
Determined; resolved; -- used with an infinitive.
Assured in mind; having no doubts; free from suspicions concerning.

That may be relied on; fit or worthy to be relied on; worthy of reliance; to be depended on; trustworthy.
Synonyms Trustworthy, trusty.

Certainly; assuredly.
Fixed; determinate; definite; specified; prescribed; settled beforehand: as in the phrase “at a time certain.”
Indefinite in the sense of not being specifically named; known but not described: applied to one or more real individual objects or characters, as distinguished from a class of objects or an order of characters; coming under particular observation, but undefined, as to kind, number, quantity, duration, etc.; some particular: as, a lady of a certain age.
Some (known but unspecified): followed by of.
Established as true or sure; placed beyond doubt; positively ascertained and known; unquestionable; indisputable.
Capable of being depended on; trustworthy.
Unfailing; unerring; sure; positive: as, a certain remedy for rheumatism.
Assured; free from doubt regarding: used absolutely, or with of, and formerly sometimes with on.
Sure: with an infinitive: as, he is certain to be there to-morrow.
Synonyms Undeniable, unquestionable, undoubted, indubitable, indisputable, incontrovertible, inevitable. Sure, Positive, Certain, Confident, etc. (see confident); unhesitating, undoubting.
Definitely known
Confident and assured
Certain to occur
Destined or inevitable
(determiner) Having been determined but unspecified. The quality of some particular subject or object which is known by the speaker to have been specifically singled out among similar entities of its class.
(idiom) (for certain) Without doubt; definitely.

Time tested, Tried and true, Tried, Certain, Straight, Undeviating, Tested, Sure, Faithful, Honest, True, Trusty, Authentic, Trustworthy, Dependable

Reliable, Doomed, Sealed, Convinced, Positive, Destined, Indisputable, Confident, Fated, Bound, Predestined, Foreordained, Careful, Sure, Definite

Tried and true, Time tested, Tried, Certain, Straight, Undeviating, Tested, Sure, Faithful, Honest, True, Trusty, Authentic, Trustworthy, Dependable

Reliable, Doomed, Sealed, Convinced, Positive, Destined, Indisputable, Confident, Fated, Bound, Predestined, Foreordained, Careful, Sure, Definite

He is business savvy, reliable and extremely knowledgeable.
Finding a reliable answer is not so simple.
GRE to be a reliable predictor of success.
At school, life follows a reliable, comprehensible schedule.
Our engines deliver reliable, efficient and durable power.
TED: Elizabeth Loftus: How reliable is your memory?
It provides reliable services at an affordable price.
Also they are to be reliable and durable.
Read this article and take notes on the following popular terms: reliable network, reliable multicast, unicast protocols, and reliability properties.
This helps support reliable revenue, and a reliable dividend.

However people have to realize the cameras only reach a certain angle and a certain range.
Certain elements have default styles or behaviors that make certain combinations likely to lead to confusion.
King to renounce certain rights, respect certain legal procedures and accept that his will could be bound by the law.
Patients have certain beliefs about their health, treatments, and capacity to perform certain techniques with aerosol devices.
This function will visually indicate when a certain defense status is activated while using certain skills.
Genes within these clusters are expressed in certain body segments at certain stages of development.
But the visitation can only happen on certain days during certain times.
Or an attempt at censorship for certain artists and certain songs.
Certain materials may not lend themselves to certain pitches.
You should find certain keys to open certain doors.