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

Name the three-letter word that can complete the below words?

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

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

What goes up but never comes down?

People put me on the table and cut me but do not eat me. What am I?

What is at the end of a rainbow?

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

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?