What is the opposite of the term "niece"?

What do you call the sister of your father?

A liter of milk can come in many presentations except for a (an):

A person who flies an aircraft is called a ____________.

What do you call the weather condition with no clouds and intense heat?

What is the term for a period of hard rain with lighting in the sky?

A place where your can buy tools, paint, and small items for house repairs is called a __________ store.