House-sit is a term commonly used when someone is responsible for looking after a house while the owner is away. However, there are various synonyms for this term that can be used to describe this task. Some of the synonyms that can be used for the term house-sit include pet-sit, babysit, guard, watch over, take care of, stay in, and caretake. These synonyms describe the same task as house-sitting but can be used in different contexts, for example, pet-sit refers to looking after pets while the owners are away, babysit refers to looking after children, and guard refers to protecting the house from intruders.