award, deal, grant, parcel, portion, present, ration, rationing, reallocate, reallocation, reallotment, reapportion, reapportionment, share, subsidisation, subsidization.
Your query has returned 393 words, which include anagrams of apportioning as well as other shorter words that can be made using the letters included in apportioning.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.