Synonyms:
- antecedent,
- anterior,
- chief,
- exordial,
- first,
- foremost,
- headmost,
- inaugural,
- inductive,
- initiatory,
- introductory,
- leading,
- precedent,
- preceding,
- precessional,
- precursory,
- prefatory,
- prefixed,
- prelim,
- preliminary,
- prelusive,
- preparative,
- preparatory,
- prepositive,
- prevenient,
- prior,
- proemial,
- propaedeutic