promontory vs natural elevation

promontory and natural elevation both are nouns.

Word	Noun	Adjective	Verb	Adverb
promontory	Yes	No	No	No
natural elevation	Yes	No	No	No

As nouns, natural elevation is a hypernym of promontory; that is, natural elevation is a word with a broader meaning than promontory:

promontory: a natural elevation (especially a rocky one that juts out into the sea)
natural elevation: a raised or elevated geological formation

Other hypernyms of promontory include elevation.

promontory (noun)	natural elevation (noun)
a natural elevation (especially a rocky one that juts out into the sea)	a raised or elevated geological formation