keep vs book

keep and book both are nouns.

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

As verbs, book is a hypernym of keep; that is, book is a word with a broader meaning than keep:

Other hypernyms of keep include hold, reserve.

keep (noun)	book (noun)
the main tower within the walls of a medieval castle or fortress	physical objects consisting of a number of pages bound together
a cell in a jail or prison	a number of sheets (ticket or stamps etc.) bound together on one edge
the financial means whereby one lives	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

keep (verb)	book (verb)
prevent (food) from rotting	engage for a performance
prevent the action or expression of	record a charge in a police register
stick to correctly or closely	arrange for and reserve (something for someone else) in advance
maintain by writing regular records	register in a hotel booker
supply with necessities and support
hold and prevent from leaving
retain possession of
look after; be the keeper of; have charge of
retain rights to
maintain for use and service
have as a supply
store or keep customarily
stop (someone or something) from doing something or being in a certain state
allow to remain in a place or position or maintain a property or feature
conform one's action or practice to
behave as expected during of holidays or rites
cause to continue in a certain state, position, or activity
supply with room and board
maintain in safety from injury, harm, or danger
fail to spoil or rot
continue a certain state, condition, or activity
to rear