portion vs shell out

portion is a noun but shell out is not a noun.

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

As verbs, shell out is a hypernym of portion; that is, shell out is a word with a broader meaning than portion:

Other hypernyms of portion include administer, allot, deal, deal out, dish out, dispense, distribute, dole out, lot, mete out, parcel out.

portion (noun)	shell out (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)

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