"Oeil de boeuf" is a French term that refers to a type of architectural window or skylight that is circular or oval in shape. There are several synonyms for this term, including "bull's eye window," "ox-eye window," and "Blenheim window." Each of these terms refers to the same type of window, but uses a different animal or place name to describe it. Other synonyms for "oeil de boeuf" may depend on the specific architectural style or historical period in which the window was popular, and may be specific to certain regions or countries. Overall, synonyms for this term are useful for understanding the nuances of various types of architectural design elements.