draw the line vs limit

draw the line is not a noun while limit is a noun.

Word	Noun	Adjective	Verb	Adverb
draw the line	No	No	Yes	No
limit	Yes	No	Yes	No

As verbs, limit is a hypernym of draw the line; that is, limit is a word with a broader meaning than draw the line:

Other hypernyms of draw the line include bound, confine, restrict, throttle, trammel.

draw the line (noun)	limit (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

draw the line (verb)	limit (verb)
reasonably object (to) or set a limit (on)	restrict or confine within limits
	place limits on (extent or amount or access)
	decide upon or fix definitely