| ROUNDEL | Circular panel, window or niche (7) |
| RECESS | An alcove or niche in a wall; a nook; a cessation of business; or, a US term for a school breaktime (6) |
| ALCOVE | A recess or niche in the wall of a room (6) |
| CARREL | From an old word for a round dance, a term for a study in a monastic cloister, thus an alcove or niche with a desk in a library for private reading (6) |
| SHUTTER | A louvred or solid wood panel for an external or internal window; or, a device for regulating the opening of a camera's aperture (7) |
| TRANSOM | What is a horizontal bar of wood or stone across a window or the top of a door? (7) |
| LUNETTE | Literally meaning "little moon", a crescent-shaped architectural recess occupied by a painting, window or relief sculpture; or, an old word for a half horseshoe (7) |
| VALANCE | A short curtain around the frame or canopy of a bed, above a window or under a shelf |
| LOUVRED | (Of a window or door) having narrow, horizontal parallel slats across its frame, sloping outwards (7) |
| MULLION | A vertical bar between the panes of a window or screen (7) |
| PICTURE | Word with window or frame |
| STAINED | With "glass", the colourful, highly decorative matter used for church windows or for the lamps designed by Louis Comfort Tiffany (7) |
| INAROOM | "You're locked ___ with no windows or doors ..." (start of many a mystery puzzle) |
| CATACOMBS | An underground burial place, consisting of tunnels with vaults or niches (9) |
| SILL | Ledge or shell below window or door [or |
| PANE | Word originally for a rag or a piece of cloth that later came to mean a division of a window or its sheet of glass; or, in philately, a page of stamps from a booklet (4) |
| SKYLIGHT | A window or lantern set in a roof or ceiling; or, the illumination through the bottom of an empty glass (8) |
| ROSACE | Word for something such as a circular aperture, knot of ribbons, oeil-de-boeuf, marigold/wheel window or ornament resembling an eglantine, sweetbrier or related flower (6) |
| CATBURGLAR | Thief who enters through a window or skylight (3-7) |
| FANLIGHT | Window over window or door |
