fictionalisation vs writing

fictionalisation and writing both are nouns.

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

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

Other hypernyms of fictionalisation include authorship, composition, penning.

fictionalisation (noun)	writing (noun)
writing in a fictional form	the activity of putting something in written form
a literary work based partly or wholly on fact but written as if it were fiction	the act of creating written works
	the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect)
	letters or symbols that are written or imprinted on a surface to represent the sounds or words of a language
	(usually plural) the collected work of an author