Knoll.
Delay.
Stall.
The word that means a small hill is "knoll."
A small natural hill.
* jumbo * giant * hefty * large
The word that matches the definition of a small hill or mound is "knoll."
Knoll, Hillock, Hummock,Pingo and Mound are words used for a small hill.
small hill
A hillock
One option is the word conga.
a Bump?
A small natural hill.