Second is the part of the first.

Second is the quality possessed by the first.

Second makes the first work.

First is a tool, used by the second.

First refers to the act of doing away with the second.

Second is more intense form of the first.

First is the female of the second.

First is worn to protect the second from external influences.

Spider makes web. Similarly, poet makes poetry.

The words in each pair are antonyms of each other.