apportionment vs allocation

apportionment and allocation both are nouns.

Word	Noun	Adjective	Verb	Adverb
apportionment	Yes	No	No	No
allocation	Yes	No	No	No

As nouns, apportionment and allocation are synonyms defined as:

apportionment and allocation: the act of distributing by allotting or apportioning; distribution according to a plan

Other synonyms of apportionment include allotment, apportioning, assignation, parceling, parcelling.

apportionment (noun)	allocation (noun)
the act of distributing by allotting or apportioning; distribution according to a plan	the act of distributing by allotting or apportioning; distribution according to a plan
	(computer science) the assignment of particular areas of a magnetic disk to particular data or instructions
	a share set aside for a specific purpose