The phrase "night stalker" can invoke a sense of fear and unease. It refers to someone who prowls or moves about during the night, often with malicious intent. There are several synonyms that can be used to describe this type of behavior or person. A night owl may refer to someone who is active during the night, but not necessarily for malevolent reasons. A prowler is someone who moves quietly and stealthily, often with the intention of observing or potentially harming someone. A nocturnal predator is a more aggressive term, indicating an individual who actively seeks out victims during the night. Regardless of the specific term used, it is clear that a night stalker is someone to be cautious of.