act, afterpiece, avant-propos, bit, breakthrough, chaser, curtain, curtain call, curtain raiser, divertimento, divertissement, epilogue, exode, exodus, exordium, expository scene, finale, foreword, front matter, frontispiece, hoke act, innovation, interlude, intermezzo, intermission, introduction, leap, number, overture, postulate, preamble, preface, prefix, prefixture, preliminary, prelude, premise, presupposition, proem, prolegomena, prolegomenon, prolepsis, protasis, routine, scene, shtick, sketch, skit, song and dance, stand-up comedy act, striptease, turn, verse, voluntary