portion vs piece

portion and piece both are nouns.

Word	Noun	Adjective	Verb	Adverb
portion	Yes	No	Yes	No
piece	Yes	No	Yes	No

As nouns, piece is a hyponym of portion; that is, piece is a word with a more specific, narrower meaning than portion:

As nouns, piece is a hyponym of portion; that is, piece is a word with a more specific, narrower meaning than portion:

As nouns, piece is a hyponym of portion; that is, piece is a word with a more specific, narrower meaning than portion:

portion: assets belonging to or due to or contributed by an individual person or group
piece: a share of something

portion (noun)	piece (noun)
the allotment of some amount by dividing something	a separate part of a whole
something less than the whole of a human artifact	game equipment consisting of an object used in playing certain board games
an individual quantity of food or drink taken as part of a meal	a portable gun
assets belonging to or due to or contributed by an individual person or group	a work of art of some artistic value
money or property brought by a woman to her husband at marriage	an item that is an instance of some type
something determined in relation to something that includes it	a distance
your overall circumstances or condition in life (including everything that happens to you)	a musical work that has been created
	an artistic or literary composition
	an instance of some kind
	a serving that has been cut from a larger portion
	a portion of a natural object
	a share of something
	a period of indeterminate length (usually short) marked by some action or condition

portion (verb)	piece (verb)
give out	repair by adding pieces
	eat intermittently; take small bites of
	join during spinning
	to join or unite the pieces of
	create by putting components or members together