| exordium(opening, addition, establishment, introduction, preface) |
| extent(noun, progress, line, approach, course) |
| first acquaintance(expression, opening, addition, establishment, introduction) |
| first taste(expression, opening, addition, establishment, introduction) |
| foreword(opening, addition, establishment, introduction, preface) |
| forward motion(noun, expression, progress, line, approach) |
| free passage(expression, idiom) |
| headway(noun, progress, line, approach, course) |
| highway(noun, progress, line, course, direction) |
| hornbook(opening, addition, establishment, preface, foreword) |
| import(appearance, reception, arrival, entering) |
| inception(appearance, opening, addition, establishment, introduction) |
| inclusion(noun, addition) |
| influx(opening, addition, establishment, introduction, preface) |
| input |
| insertion(opening, addition, establishment, introduction, reception) |
| institution(opening, addition, establishment, introduction, preface) |
| interpolation(opening, addition, establishment, introduction, preface) |
| intro(opening, addition, establishment, introduction, preface) |
| lane(noun, progress, line, course, direction) |