limit vs curtail

limit is a noun but curtail is not a noun.

Word	Noun	Adjective	Verb	Adverb
limit	Yes	No	Yes	No
curtail	No	No	Yes	No

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

Other hyponyms of limit include hold down, keep down, number, cap, curb, cut back, restrict.

limit (noun)	curtail (noun)
the greatest possible degree of something
the boundary of a specific area
as far as something can go
the greatest amount of something that is possible or allowed
the mathematical value toward which a function goes as the independent variable approaches infinity
final or latest limiting point

limit (verb)	curtail (verb)
restrict or confine within limits	place restrictions on
place limits on (extent or amount or access)	terminate or abbreviate before its intended or proper end or its full extent
decide upon or fix definitely