| interjection |
| interpolation(opening, addition, establishment, introduction, preface) |
| investiture(noun, initiation) |
| lead(opening, addition, establishment, introduction, preface) |
| lead-in(noun, opening, addition, establishment, introduction) |
| leak(break, appear, surface, emerge, materialize) |
| make public(expression, break, appear, surface, emerge) |
| materialize(beginning, surface, emerge) |
| opening remarks(expression, opening, addition, establishment, introduction) |
| out(break, appear, surface, emerge, materialize) |
| overture(performance, show, display, opening, addition) |
| pioneering(opening, addition, establishment, introduction, preface) |
| preamble(opening, addition, establishment, introduction, preface) |
| preface(opening, addition, establishment, introduction, prelude) |
| preliminaries(start, beginning, opening, addition, establishment) |
| prelude(opening, addition, establishment, introduction, preface) |
| present |
| primer(opening, addition, establishment, introduction, preface) |
| proem(opening, addition, establishment, introduction, preface) |
| prolegomenon(noun, opening, addition, establishment, introduction) |