| Subject | English | Norwegian Bokmål |
| gen. | block of flats | bygård |
| comp., MS | flat appearance | flatt utseende (The recommended visual display of a control when it is nested inside another control or scrollable region) |
| cables | flat multicore cable | flatkabel |
| comp., MS | flat file format | filformat som ikke kan redigeres (An image file format in which individual objects cannot be edited. Files stored in JPEG, GIF, and BMP formats are all flat files. The PhotoDraw MIX file format is not a flat file format) |
| cables | flat formation | flat forlegning |
| comp., MS | flat namespace | flatt navneområde (A namespace that is unstructured and cannot be partitioned, such as the network basic input/output system (NetBIOS) namespace. In a flat namespace, every object must have a unique name) |
| bot. | flat-rush | flatsevaks (Blysmus compressus (L.) Panz. ex Link; Scirpus compressus (L.) Pers.; Scirpus planifolius Grimm) |
| bot. | flat-stalked pondweed | broddtjønnaks (Potamogeton friesii Rupr.; Potamogeton mucronatus Schrad.) |
| environ. | mud flat A relatively level area of fine silt along a shore (as in a sheltered estuary) or around an island, alternately covered and uncovered by the tide, or covered by shallow water | avleiringsstrand |
| bot. | saltmarsh flat-sedge | rustsevaks (Blysmus rufus (Huds.) Link; Scirpus rufus (Huds.) Schrad.) |
| environ. | sand flat A sandy tidal flat barren of vegetation. A tidal flat is an extensive, nearly horizontal, marshy or barren tract of land that is alternately covered and uncovered by the tide, and consisting of unconsolidated sediment (mostly mud and sand). It may form the top surface of a deltaic deposit | vegetasjonsfri tidevannsgrunne |
