IPA: /ˈhɪlˌkrɛst/
KK: /ˈhɪlˌkrɛst/
The highest point or top edge of a hill.
We reached the hillcrest just in time to see the sunset.
Hillcrest is formed from "hill" (from Old English *hyll*, meaning a raised area of land) and "crest" (from Latin *crista*, meaning a tuft or plume). The word "hillcrest" refers to the top or peak of a hill.
Picture the top of a raised area of land ('hill') and the peak or tuft ('crest') — that's what hillcrest means.
No commonly confused words.