Bando is a slang term used to refer to a trap house or drug den. The word has a negative connotation and is often associated with illegal activities. However, there are several synonyms that can be used to describe such places without the negative implications. These include safehouse, hideout, fortress, stronghold, lair, shelter, refuge, sanctuary, and retreat. These synonyms can be used to describe a place of protection or safety without the connotation of illegal activities. It is important to choose the appropriate synonym based on the context and intended use of the word.