knock off vs authorship

knock off is not a noun while authorship is a noun.

Word	Noun	Adjective	Verb	Adverb
knock off	No	No	Yes	No
authorship	Yes	No	No	No

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

knock off (verb)	authorship (verb)
stop pursuing or acting
get rid of (someone who may be a threat) by killing
write quickly
take by theft
cut the price of