Synonyms of prologue

1 Syllable
proem
2 Syllables
preamble, lead-in, leadin, intro, hornbook
3 Syllables
exordium, foreword, preface, beginning, prelusion, opening, prelude, prefacing, prefaced
4 Syllables
introduction, explanation, overture, introductions
5 Syllables
interpolation, prolegomenon, interpolations