A "whistling kettle" is a common household appliance that is used to boil water. The term "whistling" refers to the sound that is made when the kettle reaches boiling point and steam is released through a small valve. However, there are many other synonyms that can be used to describe this type of kettle. Some examples include a tea kettle, a stovetop kettle, a spout kettle, a boiling kettle, and a hissing kettle. Regardless of the name used, the purpose of this kettle remains the same - to provide a quick and convenient way to heat up water for tea, coffee, or other hot beverages.