flair vs endowment

flair and endowment both are nouns.

Word	Noun	Adjective	Verb	Adverb
flair	Yes	No	No	No
endowment	Yes	No	No	No

As nouns, endowment is a hypernym of flair; that is, endowment is a word with a broader meaning than flair:

Other hypernyms of flair include gift, natural endowment, talent.

flair (noun)	endowment (noun)
distinctive and stylish elegance	the act of endowing with a permanent source of income
a natural talent	natural abilities or qualities
a shape that spreads outward	the capital that provides income for an institution