public relations vs packaging

public relations and packaging both are nouns.

Word	Noun	Adjective	Verb	Adverb
public relations	Yes	No	No	No
packaging	Yes	No	No	No

As nouns, packaging is a hypernym of public relations; that is, packaging is a word with a broader meaning than public relations:

public relations: a promotion intended to create goodwill for a person or institution
packaging: a message issued in behalf of some product or cause or idea or person or institution

Other hypernyms of public relations include promo, promotion, promotional material, publicity.

public relations (noun)	packaging (noun)
a promotion intended to create goodwill for a person or institution	the business of packing
	material used to make packages
	a message issued in behalf of some product or cause or idea or person or institution