prefatory vs introductory

prefatory and introductory both are adjectives.

Word	Noun	Adjective	Verb	Adverb
prefatory	No	Yes	No	No
introductory	No	Yes	No	No

As adjectives, prefatory and introductory are synonyms defined as:

Other synonyms of prefatory include prefatorial.

prefatory (adjective)	introductory (adjective)
serving as an introduction or preface	serving as a base or starting point
	serving to open or begin
	serving as an introduction or preface