draw the line vs throttle

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

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

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

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

draw the line (noun)	throttle (noun)
	a valve that regulates the supply of fuel to the engine
	a pedal that controls the throttle valve

draw the line (verb)	throttle (verb)
reasonably object (to) or set a limit (on)	reduce the air supply
	place limits on (extent or amount or access)
	kill by squeezing the throat of so as to cut off the air