The crossword solution for the term 'Thing That Exists' is 'ENTITY, ' which is a six-letter word. An ENTITY is a thing that has a distinct, separate existence, either material or immaterial. It can refer to a physical object, an abstract concept, or a legal person. In philosophy, an ENTITY is something that exists independently of other things. In business, an ENTITY is a company or organization that has its own legal identity. In computing, an ENTITY is a piece of data that is stored in a database.