endowment vs flair

endowment and flair both are nouns.

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

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

Other hyponyms of endowment include bent, hang, knack, genius, raw talent.

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