abridge vs curb

abridge is not a noun while curb is a noun.

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

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

Other hypernyms of abridge include curtail, cut back, restrict.

abridge (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

abridge (verb)	curb (verb)
reduce in scope while retaining essential elements	place restrictions on
lessen, diminish, or curtail	keep to the curb
	lessen the intensity of; temper; hold in restraint; hold or keep within limits