Proem and Services

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

Services and proem are semantically related. In some cases you can use "Services" instead a noun "Proem".

Services noun - Performance of duties or provision of space and equipment helpful to others.

Proem and services are semantically related. Sometimes you can use "Proem" instead a noun "Services".