This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A small hill or mound (especially on the African veld).

n. A hillock; a small kop, especially a small hill rising up from the African veld.

n. A small hill.

n. a small hill rising up from the African veld

"The cotton lands were dominated by a rocky, tree-and aloe-covered hill, which we referred to as a kopje but to me was really a small mountain."

koppie   

hummock    hillock    mound    knoll    hammock   

hillock   

escarpment    knoll    eminences    hillside    acclivity    hillock    outcropping    donga    foothill    promontory