Lead-in and Proem

Lead-in noun - The introductory section of a story.

Proem and lead-in are semantically related. in introduction topic. In some cases you can use "Proem" instead a noun phrase "Lead-in".

Proem noun - A short section (as of a book) that leads to or explains the main part.

Lead-in and proem are semantically related. You can use "Lead-in" instead a noun "Proem".