Bathyscape is a term used to describe a submersible vehicle used for deep-sea exploration. However, there are other words that can be used to describe this type of vehicle depending on the context. Submarine is one option, but it is more often associated with military use. A more technical term is submersible, which can also refer to smaller vehicles used for scientific research. Other synonyms include underwater vehicle, deep-sea vehicle, and undersea craft. These phrases can all be used interchangeably with bathyscape depending on the speaker's preference and intended audience. Regardless of the words used to describe them, these vehicles have unlocked many secrets about the ocean's depths.