restrict vs ration

restrict is not a noun while ration is a noun.

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

As verbs, ration is a hyponym of restrict; that is, ration is a word with a more specific, narrower meaning than restrict:

restrict: place restrictions on
ration: restrict the consumption of a relatively scarce commodity, as during war

Other hyponyms of restrict include abridge, immobilise, immobilize, control, restrict.

restrict (noun)	ration (noun)
	the food allowance for one day (especially for service personnel)
	a fixed portion that is allotted (especially in times of scarcity)

restrict (verb)	ration (verb)
place limits on (extent or amount or access)	distribute in rations, as in the army
place restrictions on	restrict the consumption of a relatively scarce commodity, as during war
place under restrictions; limit access to by law
prevent (information) from being circulated or disclosed