ration out vs ration

ration out is not a noun while ration is a noun.

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

As verbs, ration out and ration are synonyms defined as:

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

ration out (verb)	ration (verb)
distribute in rations, as in the army	distribute in rations, as in the army
	restrict the consumption of a relatively scarce commodity, as during war