advertizing vs advertisement

advertizing and advertisement both are nouns.

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

As nouns, advertizing and advertisement are synonyms defined as:

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

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

advertizing (noun)	advertisement (noun)
a public promotion of some product or service	a public promotion of some product or service