part vs accompaniment

part and accompaniment both are nouns.

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

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

part: the melody carried by a particular voice or instrument in polyphonic music
accompaniment: a musical part (vocal or instrumental) that supports or provides background for other musical parts

Other hyponyms of part include primo, secondo, voice part, backup, musical accompaniment, support, bass, bass part.

part (noun)	accompaniment (noun)
the actions and activities assigned to or required or expected of a person or group	the act of accompanying someone or something in order to protect them
the effort contributed by a person in bringing about a result	something added to complete or embellish or make perfect
something less than the whole of a human artifact	a musical part (vocal or instrumental) that supports or provides background for other musical parts
an item that is an instance of some type	an event or situation that happens at the same time as or in connection with another
a line of scalp that can be seen when sections of hair are combed in opposite directions
one of the portions into which something is regarded as divided and which together constitute a whole
an actor's portrayal of someone in a play
that which concerns a person with regard to a particular role or situation
the melody carried by a particular voice or instrument in polyphonic music
the extended spatial location of something
a portion of a natural object
assets belonging to or due to or contributed by an individual person or group
something determined in relation to something that includes it

part (verb)	accompaniment (verb)
move or break apart
force, take, or pull apart
depart for someplace
go one's own way; move apart
discontinue an association or relation; go different ways

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