The term "powder room" refers to a small bathroom that typically only contains a sink and toilet. While this term is commonly used in many English-speaking countries, there are actually many synonyms and alternate phrases that can be used to describe this space. Some examples of synonyms for the term "powder room" include "half bath," "cloakroom," "restroom," "lavatory," "washroom," and "guest bathroom." These phrases can be used interchangeably depending on the context, and can be a useful way to add variation to your vocabulary or to better describe the specific type of bathroom you are referring to.