alkali flat
alluvial plain
basin
billiard table
bottomland
bowling green
bushveld
campo
champaign
champaign country
coastal plain
dead flat
dead level
delta
desert
down
downs
earth
esplanade
fell
flat
flat country
flats
floor
grass veld
grassland
ground
heath
homaloid
horizontal
horizontal axis
horizontal fault
horizontal line
horizontal parallax
horizontal plane
horizontal projection
lande
ledge
level
level line
level plane
llano
lowland
lowlands
lunar mare
mare
mean sea level
mesa
mesilla
moor
flatlander
95-year-old
Shoreline
every
forestland
frolick
idolator
plateaux
riverbank
riverbanks
spavined
swampland