There are several synonyms for the phrase "eat in," which means to dine at home or within a specific location. Some possible alternatives include "cook at home," "have a home-cooked meal," "prepare dinner at home," "stay in for dinner," "eat at home," or simply "dine at home." All of these options convey the same basic idea of eating within the comforts of one's own residence, and each may be more appropriate depending on the context or tone of the conversation. Regardless of which synonym is used, however, the focus remains on enjoying a meal in a familiar and comfortable setting.