✅ A window is an opening in a wall, roof, or door that is fitted with glass or other transparent material to admit light or air and allow people to see out (She looked out the window to watch the sunset).

✅ A casement refers specifically to a window that is hinged at the side and opens outward or inward like a door (The casement allowed fresh air to flow into the room).

✅ Both words describe openings in buildings that allow light and air to enter.

✅ Window is a general term for any kind of glazed opening, while casement refers to a specific type of window that is hinged and can swing open (The window provided a view of the garden; The casement was perfect for catching the breeze).

✅ Solely means only or not involving anyone or anything else (She was solely responsible for the project).

✅ Exclusively means limited to only one person, group, or thing (This offer is exclusively for members).

✅ Both words mean limited to one person or thing.

✅ Solely emphasizes single responsibility or involvement, while exclusively often implies special access or privilege (He solely handled the arrangements; The club is exclusively for VIPs).

✅ Greasy means covered with or resembling oil or fat (The fries were too greasy).

✅ Oleaginous means having the nature or qualities of oil, often excessively so (The oleaginous feel of the lotion was unpleasant).

✅ Both words describe something oily or slick.

✅ Greasy is commonly used to describe food or surfaces, while oleaginous can be used more broadly for things like paintings, puddles, sewages, and more. Both words are also used to describe people who are unpleasantly slick and smooth-talking.