Grinning at someone is a way of expressing joy, humor, or appreciation. However, sometimes we may want to find alternative words to convey the same meaning. Some synonyms for "grin at" may include "smirk", "beam", "smile at", "laugh at", "chuckle at", "give a sly grin", "smirk at", "smile widely at", "give a sheepish grin", "glance at with amusement". Each of these alternative options conveys a slightly different tone or level of intensity, but can be used interchangeably depending on the context and personal preference. Expanding your vocabulary with synonyms like these can help you express your emotions and ideas more vividly and precisely.