Stalkier is a word used to describe someone who is excessively persistent or aggressive in their attempts to pursue or observe someone else. Some synonyms for the word stalkier include creepy, nosy, invasive, pushy, and obtrusive. These words all convey a similar sense of intrusion and unwelcome attention, but their nuances differ slightly. Creepy, for example, suggests a sense of discomfort or fear, while nosy implies an overly curious or prying nature. In general, however, all of these words should be avoided when describing someone's behavior, as it is important to respect boundaries and avoid making others feel uncomfortable or threatened.