limit vs cut back

limit is a noun but cut back is not a noun.

Word	Noun	Adjective	Verb	Adverb
limit	Yes	No	Yes	No
cut back	No	No	Yes	No

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

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

limit (noun)	cut back (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)	cut back (verb)
restrict or confine within limits	place restrictions on
place limits on (extent or amount or access)	cut down on; make a reduction in
decide upon or fix definitely	cultivate, tend, and cut back the growth of
	return in time