buildup vs packaging

buildup and packaging both are nouns.

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

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

buildup: highly favorable publicity and praise
packaging: a message issued in behalf of some product or cause or idea or person or institution

Other hypernyms of buildup include promo, promotion, promotional material, publicity.

buildup (noun)	packaging (noun)
the act of building up an accumulation	the business of packing
highly favorable publicity and praise	material used to make packages
the result of the process of accumulation	a message issued in behalf of some product or cause or idea or person or institution