The crossword solutions for the term SEPARATE THING are ITEM, which is a four-letter word. An ITEM is an individual object or thing, distinct from other objects or things. It can refer to a physical object, such as a piece of furniture, or it can refer to an intangible concept, such as an idea or thought. Items can also be used to refer to a single unit of a larger collection, such as a single ITEM in a grocery store.