curb vs keep

curb and keep both are nouns.

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

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

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

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

curb (noun)	keep (noun)
the act of restraining power or action or limiting excess	the main tower within the walls of a medieval castle or fortress
an edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)	a cell in a jail or prison
a horse's bit with an attached chain or strap to check the horse	the financial means whereby one lives

curb (verb)	keep (verb)
place restrictions on	prevent (food) from rotting
keep to the curb	prevent the action or expression of
lessen the intensity of; temper; hold in restraint; hold or keep within limits	stick to correctly or closely
	maintain by writing regular records
	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