There are several synonyms for the word "ozonize", which means to treat with ozone or convert into ozone. One possible synonym is "oxidize", which refers to the chemical reaction of a substance with oxygen. Another synonym is "sanitize", which means to eliminate or reduce the presence of microbial or bacterial agents. "Purify" is also a possible synonym for "ozonize", as it involves the removal of impurities or contaminants. Additionally, "sterilize" can be a synonym, referring to the process of killing or eliminating all living organisms or bacteria. Finally, "decontaminate" may also apply to the use of ozone to neutralize toxic or harmful substances.