confine to vs curb

confine to is not a noun while curb is a noun.

Word	Noun	Adjective	Verb	Adverb
confine to	No	No	Yes	No
curb	Yes	No	Yes	No

As verbs, curb is a hyponym of confine to; that is, curb is a word with a more specific, narrower meaning than confine to:

Other hyponyms of confine to include hold down, keep down, number, cap, curtail, cut back, restrict.

confine to (noun)	curb (noun)
	the act of restraining power or action or limiting excess
	an edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)
	a horse's bit with an attached chain or strap to check the horse

confine to (verb)	curb (verb)
restrict or confine within limits	place restrictions on
	keep to the curb
	lessen the intensity of; temper; hold in restraint; hold or keep within limits