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

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

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

By using 'because' continuously three times, can you make an English statement ?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What English word has three consecutive double letters?

What has 88 keys?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

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