advertising vs advertizement

advertising and advertizement both are nouns.

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

As nouns, advertising and advertizement are synonyms defined as:

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

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

advertising (noun)	advertizement (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