advertising vs advertisement

advertising and advertisement both are nouns.

Word	Noun	Adjective	Verb	Adverb
advertising	Yes	No	No	No
advertisement	Yes	No	No	No

As nouns, advertising and advertisement are synonyms defined as:

advertising and advertisement: a public promotion of some product or service

Other synonyms of advertising include ad, advert, advertizement, advertizing.

advertising (noun)	advertisement (noun)
the business of drawing public attention to goods and services	a public promotion of some product or service
a public promotion of some product or service