Exordiums and Overture

Overture and exordiums are semantically related. in preface topic. In some cases you can use "Overture" instead a noun "Exordiums", when it comes to topics like introduction, something new, introduction to a document, beginning of event.

Overture noun - A performance, activity, or event that precedes and sets the stage for the main event.

Exordiums and overture are semantically related. Sometimes you can replace term "Exordiums" with "Overture", this nouns are similar.