There are various synonyms for the term "eye closure" that can be used to describe the act of closing one's eyes. For instance, one might use the term "eyelid shut" to describe the physical posture of the eyes. Another synonym is "lid down" which is more succinct and descriptive of the exact motion. Additionally, some might use the phrase "close the eyes" for a more straightforward and simple expression. Another possible term is "blink-less" to convey the idea of keeping one's eyes shut. By using synonyms, writers can spice up their writing and make it sound more descriptive and engaging.