rationing vs assignation

rationing and assignation both are nouns.

Word	Noun	Adjective	Verb	Adverb
rationing	Yes	No	No	No
assignation	Yes	No	No	No

As nouns, assignation is a hypernym of rationing; that is, assignation is a word with a broader meaning than rationing:

rationing: the act of rationing
assignation: the act of distributing by allotting or apportioning; distribution according to a plan

Other hypernyms of rationing include allocation, allotment, apportioning, apportionment, parceling, parcelling.

rationing (noun)	assignation (noun)
the act of rationing	a secret rendezvous (especially between lovers)
	the act of distributing by allotting or apportioning; distribution according to a plan