compose vs writing

compose is not a noun while writing is a noun.

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

compose (noun)	writing (noun)
	the activity of putting something in written form
	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

compose (verb)	writing (verb)
make up plans or basic details for
produce a literary work
write music
put together out of existing material
calm (someone, especially oneself); make quiet
form the substance of