part vs piece

part and piece both are nouns.

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

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

As nouns, part and piece are synonyms defined as:

As nouns, part and piece are synonyms defined as:

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

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

part (noun)	piece (noun)
the actions and activities assigned to or required or expected of a person or group	a separate part of a whole
the effort contributed by a person in bringing about a result	game equipment consisting of an object used in playing certain board games
something less than the whole of a human artifact	a portable gun
an item that is an instance of some type	a work of art of some artistic value
a line of scalp that can be seen when sections of hair are combed in opposite directions	an item that is an instance of some type
one of the portions into which something is regarded as divided and which together constitute a whole	a distance
an actor's portrayal of someone in a play	a musical work that has been created
that which concerns a person with regard to a particular role or situation	an artistic or literary composition
the melody carried by a particular voice or instrument in polyphonic music	an instance of some kind
the extended spatial location of something	a serving that has been cut from a larger portion
a portion of a natural object	a portion of a natural object
assets belonging to or due to or contributed by an individual person or group	a share of something
something determined in relation to something that includes it	a period of indeterminate length (usually short) marked by some action or condition

part (verb)	piece (verb)
move or break apart	repair by adding pieces
force, take, or pull apart	eat intermittently; take small bites of
depart for someplace	join during spinning
go one's own way; move apart	to join or unite the pieces of
discontinue an association or relation; go different ways	create by putting components or members together

part (adverb)	piece (adverb)
to some extent; in some degree; not wholly