book vs Luke

book and Luke both are nouns.

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

book (noun)	Luke (noun)
physical objects consisting of a number of pages bound together	one of the four Gospels in the New Testament; contains details of Jesus's birth and early life
a number of sheets (ticket or stamps etc.) bound together on one edge	(New Testament) the Apostle closely associated with St. Paul and traditionally assumed to be the author of the third Gospel
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)	Luke (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