Banana and Chit-chat

Banana noun - Any of several tropical and subtropical treelike herbs of the genus Musa having a terminal crown of large entire leaves and usually bearing hanging clusters of elongated fruits.

Chit-chat and banana are semantically related. In some cases you can use "Chit-chat" instead a noun "Banana".

Chit-chat noun - Light informal conversation for social occasions.

Banana and chit-chat are semantically related. Sometimes you can use "Banana" instead a noun phrase "Chit-chat".