throttle vs restrict

throttle is a noun but restrict is not a noun.

Word	Noun	Adjective	Verb	Adverb
throttle	Yes	No	Yes	No
restrict	No	No	Yes	No

As verbs, throttle and restrict are synonyms defined as:

Other synonyms of throttle include bound, confine, limit, trammel.

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

throttle (verb)	restrict (verb)
reduce the air supply	place limits on (extent or amount or access)
place limits on (extent or amount or access)	place restrictions on
kill by squeezing the throat of so as to cut off the air	place under restrictions; limit access to by law
	prevent (information) from being circulated or disclosed