Analogy

First produces the second.

Machine is made to work by a man. Similarly, slave works under the instruction of his master .

Second is a shape obtained by pulling the opposite ends of the first.

The words in each pair are antonyms of each other.

First needs the second badly.

Cancer is non-communicable disease.

First is a bigger form of the second.

Second denotes the purpose for which the first is undertaken.

Pilot of Aeroplane sits in Cockpit and driver of Train works in Engine.