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

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

I taste better than I can smell. Who am I?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

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

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

The more it dries, the wetter it becomes. Can you tell what it is?

What can you catch but never throw?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?