Alternative dialogue words you can use instead of the word…

Plain

As a noun

Exhaustive

Amplitude

Bottom

Bottomland

Compass

Depth

Distance

Domain

Emptiness

Expanse

Expansion

Extent

Extension

Field

Flat

Floodplain

Grassland

Heath

Immensity

Latitude

Lea

Length

Ley

Lowland

Magnitude

Meadow

Moor

Prairie

Range

Reach

Savanna

Savannah

Scope

Sheet

Span

Spectrum

Sphere

Spread

Steppe

Sweeping

Territory

Tundra

Void

Waste