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

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

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?

What is so fragile that saying its name breaks it?

There is something which is always coming but never arrives?

What can you catch but never throw?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What word is pronounced the same if you take away four of its five letters?

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?