Hill
Knoll
The kanji and the word are exactly the same. That means they share meanings as well.
おか
The reading for the vocab version of this word is the same as 岡 which has the same meaning and the same reading. Lucky!
初めてマニュアルで運転した時、丘のてっぺんでエンストしてしまいました。
On my first day of driving a stick, my car stalled at the top of a hill.