Synonyms of 'terrain'
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A particular kind of country is an area of land which has particular characteristics or is connected with a particular well-known person.
This is some of the best walking country in the district.
You can refer to land as ground, especially when it has very few buildings or when it is considered to be special in some way.
a stretch of waste ground
Thesaurus for terrain from the Collins English Thesaurus
Terrain is used to refer to an area of land or a type of land when you are considering its physical features .