The word "impoundage" is a relatively obscure term used to refer to the act of impounding or confiscating something. Some possible synonyms for this term include seizure, confiscation, impoundment, detention, restraint, and appropriation. These words all describe similar actions of taking possession of something by force or against the will of the owner. Depending on the context, other related terms like seizure could also be used, such as attachment, capture, or expropriation. Whether in legal, financial, or property contexts, there are multiple words that can be used to describe the act of impounding or seizing property.