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.
Land is the part of the world that consists of ground, rather than sea or air.
It isn't clear whether the plane went down over land or sea.
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 .