noble vs high-flown

noble is a noun but high-flown is not a noun.

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

noble (noun)	high-flown (noun)
a titled peer of the realm

noble (adjective)	high-flown (adjective)
having or showing or indicative of high or elevated character	of high moral or intellectual value; elevated in nature or style
of or belonging to or constituting the hereditary aristocracy especially as derived from feudal times	pretentious (especially with regard to language or ideals)
impressive in size, manner, or appearance
inert especially toward oxygen