reapportionment vs reallotment

reapportionment and reallotment both are nouns.

Word	Noun	Adjective	Verb	Adverb
reapportionment	Yes	No	No	No
reallotment	Yes	No	No	No

As nouns, reapportionment and reallotment are synonyms defined as:

reapportionment and reallotment: a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results)

Other synonyms of reapportionment include reallocation.

reapportionment (noun)	reallotment (noun)
a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results)	a new apportionment (especially a new apportionment of congressional seats in the United States on the basis of census results)