writing vs drafting

writing and drafting both are nouns.

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

As nouns, drafting is a hyponym of writing; that is, drafting is a word with a more specific, narrower meaning than writing:

writing (noun)	drafting (noun)
the activity of putting something in written form	the creation of artistic pictures or diagrams
the act of creating written works	writing a first version to be filled out and polished later
the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect)	the craft of drawing blueprints
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