A de-odorizer is a substance or product designed to remove or neutralize unpleasant odors. There is a wide range of synonyms for this term, including air freshener, room deodorizer, odor eliminator, scent neutralizer, fragrancer, freshening agent, odor killer, odor control, and odor reducer. These synonyms are used interchangeably depending on the specific purpose or context of use. Air fresheners are commonly used for masking unpleasant odors, while odor eliminators and neutralizers are designed to remove odors at their source. Fragrancers are used to add a pleasant scent to a space, while freshening agents are used to refresh and enhance an area's air quality.