What is another word for "prelusory"?

Roget's Thesaurus (1911) lists these synonyms for "prelusory": advance, aforementioned, aforesaid, antecedence, antecedency, antecedent, anteposition, anterior, anteriority, avant-courier, ball, before, bellwether, come, coming, dance, dawn, exordium, fashion, first, foreboding, forerunner, foreword, former, front, frontispiece, get, groundwork, harbinger, have, head, heading, herald, importance, inaugural, influence, introduce, introduction, introductory, lead.