| hornbook(opening, addition, establishment, preface, foreword) |
| inauguration(opening, addition, establishment, introduction, preface) |
| inception(opening, addition, establishment, introduction, preface) |
| influx(opening, addition, establishment, introduction, preface) |
| ingress(opening, addition, establishment, introduction, preface) |
| initiation(noun, opening, addition, establishment, introduction) |
| insertion(noun, opening, addition, establishment, introduction) |
| installation(opening, addition, establishment, introduction, preface) |
| institution(opening, addition, establishment, introduction, preface) |
| interlude |
| intermezzo |
| intermission |
| interpolation(opening, addition, establishment, introduction, preface) |
| launch(opening, addition, establishment, introduction, preface) |
| lead(opening, addition, establishment, introduction, preface) |
| leap |
| libretto |
| number |
| opening remarks(expression, opening, addition, establishment, introduction) |
| pioneering(opening, addition, establishment, introduction, preface) |