paternity vs authorship

paternity and authorship both are nouns.

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

As nouns, paternity and authorship are synonyms defined as:

paternity and authorship: the act of initiating a new idea or theory or writing

paternity (noun)	authorship (noun)
the act of initiating a new idea or theory or writing	the act of creating written works
the kinship relation between an offspring and the father	the act of initiating a new idea or theory or writing
the state of being a father