bazaar vs book fair

bazaar and book fair both are nouns.

Word	Noun	Adjective	Verb	Adverb
bazaar	Yes	No	No	No
book fair	Yes	No	No	No

As nouns, book fair is a hyponym of bazaar; that is, book fair is a word with a more specific, narrower meaning than bazaar:

bazaar: a sale of miscellany; often for charity
book fair: bazaar at which books are sold or auctioned off in order to raise funds for a worthy cause

Other hyponyms of bazaar include bookfair, craft fair.

bazaar (noun)	book fair (noun)
a sale of miscellany; often for charity	bazaar at which books are sold or auctioned off in order to raise funds for a worthy cause
a shop where a variety of goods are sold	fair organized by publishers or booksellers to promote the sale of books
a street of small shops (especially in Orient)