Reliable is something or someone that can be trusted. For example: Let's say you ran a business. Every day John turns up for work on time, whereas Terry is always calling in sick.
I'm sure you can work out which one is reliable.
The answer is nor reliable
Reliable
is this broadband reliable
he is very reliable
self-reliable
Very Reliable
As reliable as the code writer.
She is a reliable friend. :)
It is not absolutely reliable
very reliable
There is no such thing as a "reliable horoscope". Horoscopes are superstitions; there is nothing "reliable" about them.
The word reliability is a noun. It is the quality of being reliable.