ADVERTIZE
advertise, publicize, advertize, publicise
(verb) call attention to; “Please don’t advertise the fact that he has AIDS”
advertise, advertize, promote, push
(verb) make publicity for; try to sell (a product); “The salesman is aggressively pushing the new computer model”; “The company is heavily advertizing their new laptops”
Source: WordNet® 3.1
Etymology
Verb
advertize (third-person singular simple present advertizes, present participle advertizing, simple past and past participle advertized)
(American spelling) Alternative spelling of advertise
Usage notes
The z spelling is an archaic form in British English. It appears occasionally in modern American English but is sometimes deprecated because its etymology is not from Greek.
Source: Wiktionary