IPA: /ˈhɪl.tɒp/
KK: /ˈhɪltɑp/
The highest point or peak of a hill.
We reached the hilltop just in time to see the sunset.
Hilltop → It is formed from "hill" (from Old English *hyll*, meaning a naturally raised area of land) and "top" (from Old English *top*, meaning the highest point). The word "hilltop" refers to the highest point of a hill.
Imagine standing at the "highest point" ('top') of a "raised area of land" ('hill') — that's what a hilltop is.
No commonly confused words.