high-flown vs elevated

high-flown is not a noun while elevated is a noun.

Word	Noun	Adjective	Verb	Adverb
high-flown	No	Yes	No	No
elevated	Yes	Yes	No	No

As adjectives, high-flown and elevated are synonyms defined as:

high-flown and elevated: of high moral or intellectual value; elevated in nature or style

Other synonyms of high-flown include exalted, grand, high-minded, idealistic, lofty, noble-minded, rarefied, rarified, sublime.

high-flown (noun)	elevated (noun)
	a railway that is powered by electricity and that runs on a track that is raised above the street level

high-flown (adjective)	elevated (adjective)
of high moral or intellectual value; elevated in nature or style	increased in amount or degree
pretentious (especially with regard to language or ideals)	of high moral or intellectual value; elevated in nature or style
	raised above the ground