advertising campaign vs ad blitz

advertising campaign and ad blitz both are nouns.

Word	Noun	Adjective	Verb	Adverb
advertising campaign	Yes	No	No	No
ad blitz	Yes	No	No	No

As nouns, advertising campaign and ad blitz are synonyms defined as:

advertising campaign and ad blitz: an organized program of advertisements

Other synonyms of advertising campaign include ad campaign.

advertising campaign (noun)	ad blitz (noun)
an organized program of advertisements	an organized program of advertisements