Can anyone tell me a word in the English dictionary which has a silent 'z'?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What runs around the whole yard without moving?

What is always in front of you but can’t be seen?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What goes up but never comes down?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Which English verb becomes past tense just by rearranging the letters?

You can see it everyday, But cannot touch it at will. What is it?