champaign (n.)
- bailiwick
- basin
- bottomland
- campo
- delta
- demesne
- desert
- domain
- dominion
- down
- downs
- fell
- flat
- flats
- grassland
- heath
- level
- llano
- lowland
- lowlands
- mare
- mesa
- moor
- moorland
- pampas
- peneplain
- plain
- plains
- plateau
- prairie
- province
- savanna
- sphere
- steppe
- table
- tableland
- terrain
- territory
- tundra
- upland
- vega
- veld
- walk
- weald
- wold