curb vs abridge

curb is a noun but abridge is not a noun.

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

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

Other hyponyms of curb include immobilise, immobilize, ration, control, restrict.

curb (noun)	abridge (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

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