Aerators are devices that help improve the oxygen levels in liquids such as water or wine. There are several synonyms for aerators that can be used interchangeably depending on the context. One synonym is "diffuser," which refers to a device that spreads small air bubbles throughout a liquid to increase oxygenation. "Agitator" is another synonym commonly used to describe devices that mix and aerate liquids. "Aerator fountain" refers to a type of decorative water feature that adds oxygen to a water source. Other synonyms include "oxygenator," "bubbler," and "aeration system." Overall, the use of synonyms can help add variety to writing and prevent repetition.