ad vs packaging

ad and packaging both are nouns.

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

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

ad: a public promotion of some product or service
packaging: a message issued in behalf of some product or cause or idea or person or institution

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

ad (noun)	packaging (noun)
a public promotion of some product or service	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