elevation vs highland

elevation and highland both are nouns.

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

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

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

elevation (noun)	highland (noun)
the act of increasing the wealth or prestige or power or scope of something	elevated (e.g., mountainous) land
drawing of an exterior of a structure
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

elevation (adjective)	highland (adjective)
	used of high or hilly country