prologue vs introduction

prologue and introduction both are nouns.

Word	Noun	Adjective	Verb	Adverb
prologue	Yes	No	No	No
introduction	Yes	No	No	No

As nouns, introduction is a hypernym of prologue; that is, introduction is a word with a broader meaning than prologue:

prologue (noun)	introduction (noun)
an introduction to a play	the act of putting one thing into another
	the act of beginning something new
	the act of starting something for the first time; introducing something new
	the first section of a communication
	formally making a person known to another or to the public
	a basic or elementary instructional text
	a new proposal