endorsement vs publicity

endorsement and publicity both are nouns.

Word	Noun	Adjective	Verb	Adverb
endorsement	Yes	No	No	No
publicity	Yes	No	No	No

As nouns, publicity is a hypernym of endorsement; that is, publicity is a word with a broader meaning than endorsement:

endorsement: a promotional statement (as found on the dust jackets of books)
publicity: a message issued in behalf of some product or cause or idea or person or institution

Other hypernyms of endorsement include packaging, promo, promotion, promotional material.

endorsement (noun)	publicity (noun)
the act of endorsing	the quality of being open to public view
formal and explicit approval	a message issued in behalf of some product or cause or idea or person or institution
a promotional statement (as found on the dust jackets of books)
a speech seconding a motion
a signature that validates something