parcel out vs portion

parcel out is not a noun while portion is a noun.

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

As verbs, portion is a hyponym of parcel out; that is, portion is a word with a more specific, narrower meaning than parcel out:

Other hyponyms of parcel out include allot, assign, reallot, deal, apply, give, roll out.

parcel out (noun)	portion (noun)
	the allotment of some amount by dividing something
	something less than the whole of a human artifact
	an individual quantity of food or drink taken as part of a meal
	assets belonging to or due to or contributed by an individual person or group
	money or property brought by a woman to her husband at marriage
	something determined in relation to something that includes it
	your overall circumstances or condition in life (including everything that happens to you)

parcel out (verb)	portion (verb)
administer or bestow, as in small portions	give out