parcel vs apportionment

parcel and apportionment both are nouns.

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

As nouns, apportionment is a hypernym of parcel; that is, apportionment is a word with a broader meaning than parcel:

parcel: the allotment of some amount by dividing something
apportionment: the act of distributing by allotting or apportioning; distribution according to a plan

Other hypernyms of parcel include allocation, allotment, apportioning, assignation, parceling, parcelling.

parcel (noun)	apportionment (noun)
the allotment of some amount by dividing something	the act of distributing by allotting or apportioning; distribution according to a plan
a wrapped container
a collection of things wrapped or boxed together
an extended area of land

parcel (verb)	apportionment (verb)
make into a wrapped container
cover with strips of canvas
divide into parts