fair vs book fair

fair and book fair both are nouns.

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

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

fair: 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 fair include bookfair, craft fair.

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

fair: gathering of producers to promote business
book fair: fair organized by publishers or booksellers to promote the sale of books

Other hyponyms of fair include exhibition, bookfair.

fair (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 traveling show; having sideshows and rides and games of skill etc.	fair organized by publishers or booksellers to promote the sale of books
a competitive exhibition of farm products
gathering of producers to promote business

fair (adjective)	book fair (adjective)
(of a baseball) hit between the foul lines
free from favoritism or self-interest or bias or deception; conforming with established standards or rules
very pleasing to the eye
(used of hair or skin) pale or light-colored
free of clouds or rain
gained or earned without cheating or stealing
attractively feminine
(of a manuscript) having few alterations or corrections
not excessive or extreme
lacking exceptional quality or ability

fair (verb)	book fair (verb)
join so that the external surfaces blend smoothly

fair (adverb)	book fair (adverb)
without favoring one party, in a fair evenhanded manner
in conformity with the rules or laws and without fraud or cheating