Alcove and Bow window

Alcove noun - A freestanding airy structure in a scenic setting (as a park) typically offering commanding views.

Bow window and alcove are semantically related. In some cases you can use "Bow window" instead a noun "Alcove".

Bow window noun - A window that sticks out from the outside wall of a house.

Alcove and bow window are semantically related. Sometimes you can use "Alcove" instead a noun phrase "Bow window".