prepare vs keep

prepare is not a noun while keep is a noun.

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

As verbs, keep is a hyponym of prepare; that is, keep is a word with a more specific, narrower meaning than prepare:

prepare (noun)	keep (noun)
	the main tower within the walls of a medieval castle or fortress
	a cell in a jail or prison
	the financial means whereby one lives

prepare (verb)	keep (verb)
make ready or suitable or equip in advance for a particular purpose or for some use, event, etc	prevent (food) from rotting
undergo training or instruction in preparation for a particular role, function, or profession	prevent the action or expression of
create by training and teaching	stick to correctly or closely
arrange by systematic planning and united effort	maintain by writing regular records
prepare for eating by applying heat	supply with necessities and support
to prepare verbally, either for written or spoken delivery	hold and prevent from leaving
lead up to and soften by sounding the dissonant note in it as a consonant note in the preceding chord	retain possession of
educate for a future role or function	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