Coreless refers to something that lacks a central or essential part. It is a term commonly used to describe fruits or vegetables with no seed or core. For instance, a coreless apple is a fruit that doesn't contain seeds or has a small core. Synonyms for coreless include seedless, pitless, hollow, centerless, and empty. These terms are often used interchangeably, but they mainly refer to the same concept. The usage of these synonyms depends on the context, and they all convey the same meaning that pertains to something without a center or core. Overall, these synonyms serve to describe the absence of an essential part in various things.