Highland
Part of speech: noun
Definition: An area of land that is at elevation; mountainous land.
Part of speech: adjective
Definition: Relating to highlands.
Upland
Part of speech: adjective
Definition: Of, relating to, or situated in the uplands.
Part of speech: noun
Definition: The area in the interior of a country with a generally higher elevation; often hilly, but not generally mountainous (compare highlands).