Encroach upon is a phrase that refers to the act of trespassing or invading the personal space, boundaries, or rights of another person. Although it is a commonly used phrase, there are several synonyms that can also be used to convey the same meaning. These include words like infringe, impinge, invade, trespass, violate, intrude, meddle, interlope, and encumber. Each of these words carries a different connotation or emphasis but essentially means the same thing as encroach upon. By using these alternative synonyms, one can add variety and depth to their language and writing while also conveying the intended meaning clearly and effectively.