compose vs authorship

compose is not a noun while authorship is a noun.

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

compose (noun)	authorship (noun)
	the act of creating written works
	the act of initiating a new idea or theory or writing

compose (verb)	authorship (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