PR vs packaging

PR and packaging both are nouns.

Word	Noun	Adjective	Verb	Adverb
PR	Yes	No	No	No
packaging	Yes	No	No	No

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

PR: 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 PR include promo, promotion, promotional material, publicity.

PR (noun)	packaging (noun)
a promotion intended to create goodwill for a person or institution	the business of packing
a self-governing commonwealth associated with the United States occupying the island of Puerto Rico	material used to make packages
	a message issued in behalf of some product or cause or idea or person or institution