genius vs flair

genius and flair both are nouns.

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

As nouns, genius and flair are synonyms defined as:

genius (noun)	flair (noun)
exceptional creative ability	distinctive and stylish elegance
a natural talent	a natural talent
unusual mental ability	a shape that spreads outward
someone who has exceptional intellectual ability and originality
someone who is dazzlingly skilled in any field