Unwanted visitors are a nuisance that can disturb one's home, office or privacy. There are a variety of synonyms that can be used to describe these pesky intruders. For example, they can be called intruders, trespassers, interlopers, unwanted guests, uninvited guests, or even unwanted pests. These terms can be used interchangeably to describe anything or anyone that has entered a space without permission. Whether it's a fly in the kitchen or a stranger on the porch, the term "unwanted visitor" can encompass many different types of intrusions. Whatever the situation, it's important to be vigilant and keep unwanted visitors at bay.