Subcontinent
A subcontinent was a large area within a continent.

By the late 24th century, efforts were under way to create a new subcontinent, Atlantis, in the middle of the Atlantic Ocean on Earth. While discussing the project  with his brother, Robert Picard stated that he believed Earth didn't need another subcontinent. ()

A class M planet in orbit of a G-type star was chosen as the new home for the recently awakened Vaadwaur. The planet featured a subcontinent with edible vegetation and an underground water supply. Unfortunately, the region was also subject to windstorms. () 

The Central Protectorate of Kelemane's planet was located on a subcontinent on the southern hemisphere of the planet. () 

When in orbit of Norcadia, The Doctor chose to spend one afternoon by visiting the Norcadian Museum of Entomology and seeing a "fascinating exhibit of beetle larvae from the equatorial subcontinent." ()

A Dinaali woman who was chief engineer of a water irrigation facility which provided water to half a subcontinent on Dinaal was treated in level blue of Hospital Ship 4-2 in 2377. ()

The natives of Otrin's homeworld lived in a small subterranean settlement on the northern subcontinent of their homeworld. ()

The energy barrier that separated and protected the Ventu from the Ledosians was located on the southern subcontinent on Ledos. ()

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Landforms