fictionalisation vs authorship

fictionalisation and authorship both are nouns.

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

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

Other hypernyms of fictionalisation include composition, penning, writing.

fictionalisation (noun)	authorship (noun)
writing in a fictional form	the act of creating written works
a literary work based partly or wholly on fact but written as if it were fiction	the act of initiating a new idea or theory or writing