authorship vs introduction

authorship and introduction both are nouns.

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

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

authorship: the act of initiating a new idea or theory or writing
introduction: the act of starting something for the first time; introducing something new

Other hypernyms of authorship include creation, foundation, founding, initiation, innovation, instauration, institution, origination.

authorship (noun)	introduction (noun)
the act of creating written works	the act of putting one thing into another
the act of initiating a new idea or theory or writing	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