The difference between Forespeech and Introduction

When used as nouns, forespeech means a preface, whereas introduction means the act or process of introducing.

check bellow for the other definitions of Forespeech and Introduction

Introduction as a noun:

The act or process of introducing.
Introduction as a noun:

A means, such as a personal letter, of presenting one person to another.
Introduction as a noun:

An initial section of a book or article, which introduces the subject material.
Introduction as a noun:

A written or oral explanation of what constitutes the basis of an issue.