elevation vs mountain

elevation and mountain both are nouns.

Word	Noun	Adjective	Verb	Adverb
elevation	Yes	No	No	No
mountain	Yes	No	No	No

As nouns, mountain is a hyponym of elevation; that is, mountain is a word with a more specific, narrower meaning than elevation:

elevation: a raised or elevated geological formation
mountain: a land mass that projects well above its surroundings; higher than a hill

Other hyponyms of elevation include highland, upland, hill, mount, foreland, head, headland, promontory, ridge, swell.

elevation (noun)	mountain (noun)
the act of increasing the wealth or prestige or power or scope of something	a land mass that projects well above its surroundings; higher than a hill
drawing of an exterior of a structure	(often followed by `of') a large number or amount or extent
distance of something above a reference point (such as sea level)
(ballet) the height of a dancer's leap or jump
the event of something being raised upward
a raised or elevated geological formation
angular distance above the horizon (especially of a celestial object)
the highest level or degree attainable; the highest stage of development