contain vs keep

contain is not a noun while keep is a noun.

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

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

contain: lessen the intensity of; temper; hold in restraint; hold or keep within limits
keep: prevent the action or expression of

Other hypernyms of contain include hold back, keep back, restrain.

contain (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

contain (verb)	keep (verb)
hold back, as of a danger or an enemy; check the expansion or influence of	prevent (food) from rotting
lessen the intensity of; temper; hold in restraint; hold or keep within limits	prevent the action or expression of
include or contain; have as a component	stick to correctly or closely
be divisible by	maintain by writing regular records
contain or hold; have within	supply with necessities and support
be capable of holding or containing	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