There are plenty of synonyms for the phrase "stared at" that can add some variety to your writing. One option is "gazed at," which carries a similar intensity but feels slightly less confrontational. Another possibility is "eyed," which has a sharper, more pinpointed quality to it that can work well in certain contexts. "Fixed on" is another phrase that can convey a sense of concentration and focus, especially when used to describe a character's gaze. Meanwhile, "studied" can also be a good way to describe the act of looking closely at something with intent and attention. Overall, there are many alternatives to "stared at" that can help your writing feel more dynamic and varied.