| interpolation(opening, addition, establishment, introduction, preface) |
| interposition |
| interposure |
| interruption |
| intervention |
| intro(opening, addition, establishment, introduction, preface) |
| launch(opening, addition, establishment, introduction, preface) |
| lead(opening, addition, establishment, introduction, preface) |
| lead-in(noun, opening, addition, establishment, introduction) |
| movement(transport, swell, current, wave, passage) |
| obtrusion |
| opening(addition, establishment, introduction, preface, prelude) |
| opening remarks(expression, opening, addition, establishment, introduction) |
| overture(opening, addition, establishment, introduction, preface) |
| pioneering(opening, addition, establishment, introduction, preface) |
| preamble(opening, addition, establishment, introduction, preface) |
| preface(opening, addition, establishment, introduction, prelude) |
| preliminaries(opening, addition, establishment, introduction, preface) |
| prelude(opening, addition, establishment, introduction, preface) |
| presentation(opening, addition, establishment, introduction, preface) |