Abuttal, also known as abutment, is a term commonly used in real estate and legal documents to refer to the boundary of a property or the point where two pieces of land meet. While there are no common antonyms for the word abuttal, some opposite concepts to consider could be separation, distance, or isolation. These antonyms suggest a lack of connection or proximity between objects or land masses, as opposed to the physical joining that abuttal implies. For example, instead of describing a property's abuttal to a road, one could describe its distance or separation from the road.