apportioning vs allotment

apportioning and allotment both are nouns.

Word	Noun	Adjective	Verb	Adverb
apportioning	Yes	No	No	No
allotment	Yes	No	No	No

As nouns, apportioning and allotment are synonyms defined as:

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

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

apportioning (noun)	allotment (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
	a share set aside for a specific purpose