IPA: /ˈklɪf.tɒp/
KK: /ˈklɪfˌtɑp/
The highest part of a steep rock face, often overlooking a valley or the sea.
We stood at the clifftop, enjoying the breathtaking view of the ocean below.
Clifftop is formed from "cliff" (from Old English "clyf", meaning a steep rock or precipice) and "top" (from Old English "top", meaning the highest point). The word "clifftop" refers to the highest point of a steep rock or precipice.
Picture standing at the 'highest point' ('top') of a 'steep rock' ('cliff') — that's what a clifftop is.
No commonly confused words.