limit vs mark off

limit is a noun but mark off is not a noun.

Word	Noun	Adjective	Verb	Adverb
limit	Yes	No	Yes	No
mark off	No	No	Yes	No

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

limit (noun)	mark off (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)	mark off (verb)
restrict or confine within limits	set boundaries to and delimit
place limits on (extent or amount or access)	put a check mark on or near or next to
decide upon or fix definitely