book vs Micah

book and Micah both are nouns.

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

book (noun)	Micah (noun)
physical objects consisting of a number of pages bound together	an Old Testament book telling the prophecies of Micah foretelling the destruction of Jerusalem
a number of sheets (ticket or stamps etc.) bound together on one edge	a minor Hebrew prophet (8th century BC) who prophesied the future destruction of Jerusalem and Samaria, and the destruction and then future restoration of the Judean state
a written work or composition that has been published (printed on pages bound together)
a written version of a play or other dramatic composition; used in preparing for a performance
a compilation of the known facts regarding something or someone
a major division of a long written composition
a collection of rules or prescribed standards on the basis of which decisions are made
a collection of playing cards satisfying the rules of a card game
a record in which commercial accounts are recorded

book (verb)	Micah (verb)
engage for a performance
record a charge in a police register
arrange for and reserve (something for someone else) in advance
register in a hotel booker