As an adjective hillocky
is resembling a hillock.
As a noun hillock is
a small hill.
hillock
English
Noun
(
en noun)
a small hill
* 2014 , Ian Jack, " Is this the end of Britishness
", The Guardian , 16 September 2014:
- Just upstream of Dryburgh Abbey, a reproduction of a classical Greek temple stands at the top of a wooded hillock on the river’s north bank.