portion out vs apportion

portion out and apportion both are verbs.

Word	Noun	Adjective	Verb	Adverb
portion out	No	No	Yes	No
apportion	No	No	Yes	No

As verbs, portion out and apportion are synonyms defined as:

Other synonyms of portion out include deal, divvy up, share.

portion out (verb)	apportion (verb)
give out as one's portion or share	give out as one's portion or share
	distribute according to a plan or set apart for a special purpose