advertisement vs advertizement

advertisement and advertizement both are nouns.

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

As nouns, advertisement and advertizement are synonyms defined as:

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

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

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