There are several words that can be used as synonyms for "eye-flap". Some of these include eyelid, lid, ocular flap, and blinker. Eyelid and lid are perhaps the most commonly used synonyms, both referring to the movable folds of skin that cover and protect the eye. Ocular flap is a more technical term, often used in the context of medical procedures involving surgery on the eye. Blinker is a less commonly used term for the eyelid, often used in the context of horses wearing blinkers to limit their peripheral vision. Overall, there are several words that can be used as synonyms for eye-flap, depending on the context and intended meaning.