A Buchner funnel is a laboratory apparatus that is commonly used for vacuum filtration. It is a funnel-shaped glass or porcelain device that sits on top of a flask. The funnel includes a perforated plate that sits at the bottom and is designed to hold a filter paper in place. However, if you need to refer to the device by a different name, there are several synonyms that you can use. For instance, it is sometimes referred to as a vacuum filtration funnel, or a filter funnel. Other names for this device include a suction filter funnel or a lab glass funnel. Ultimately, the name you choose will depend on the specific context and the preferences of your audience.