No, settlement and subsidence are not the same thing, and will require different insurance solutions that reflect the unique incidents or risks facing a property. While both terms refer to the downward movement of a building, they are caused by different factors.  

Settlement is the downward movement of a property in the first 10 years of it being built, caused by the weight of the home. Subsidence, however, refers to the downward movement of a property caused by issues with the foundation under the home, such as trees growing under the property or drain leaks moistening the soil.