Encroachers refer to individuals who intrude or take over an area that is not rightfully theirs. Synonyms for encroachers include interlopers, trespassers, invaders, usurpers, infiltrators, squatters, and invaders. Interlopers is used to describe individuals who interfere with the activities or affairs of others. Trespassers are those who illegally enter someone else's property. Invaders are people who forcefully enter or enter without permission. Usurpers take over or seize control of someone's property or position. Infiltrators are individuals who infiltrate or enter an organization or group in order to gain information. Squatters are individuals who occupy and reside on a property without permission or legal ownership. Invaders are people who enter a country or territory without permission.