prairie (n.)
- basin
- bottomland
- campo
- champaign
- clearance
- clearing
- countryside
- delta
- desert
- down
- downs
- earth
- esplanade
- farmland
- fell
- flat
- flats
- floor
- glade
- grass
- grassland
- grazing
- ground
- heath
- highlands
- horizontal
- lea
- ledge
- level
- llano
- lowland
- lowlands
- mare
- mead
- meadow
- mesa
- moor
- moorland
- outback
- pampas
- park
- parterre
- pasturage
- pasture
- peneplain
- plain
- plains
- plane
- plateau
- platform
- province
- provinces
- range
- savanna
- steppe
- swale
- table
- tableland
- terrace
- terrain
- territory
- tundra
- upland
- vega
- veld
- weald
- wilderness
- wold
- woodland