part vs split

part and split both are nouns.

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

As nouns, split is a hyponym of part; that is, split 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
split: a promised or claimed share of loot or money

As verbs, part and split are synonyms defined as:

Other synonyms of part include separate.

As verbs, part and split are synonyms defined as:

part and split: discontinue an association or relation; go different ways

Other synonyms of part include break, break up, separate, split up.

part (noun)	split (noun)
the actions and activities assigned to or required or expected of a person or group	division of a group into opposing factions
the effort contributed by a person in bringing about a result	the act of rending or ripping or splitting something
something less than the whole of a human artifact	extending the legs at right angles to the trunk (one in front and the other in back)
an item that is an instance of some type	an increase in the number of outstanding shares of a corporation without changing the shareholders' equity
a line of scalp that can be seen when sections of hair are combed in opposite directions	(tenpin bowling) a divided formation of pins left standing after the first bowl
one of the portions into which something is regarded as divided and which together constitute a whole	a dessert of sliced fruit and ice cream covered with whipped cream and cherries and nuts
an actor's portrayal of someone in a play	an opening made forcibly as by pulling apart
that which concerns a person with regard to a particular role or situation	a lengthwise crack in wood
the melody carried by a particular voice or instrument in polyphonic music	a promised or claimed share of loot or money
the extended spatial location of something	a bottle containing half the usual amount
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 (adjective)	split (adjective)
	(especially of wood) cut or ripped longitudinally with the grain
	having been divided; having the unity destroyed

part (verb)	split (verb)
move or break apart	come open suddenly and violently, as if from internal pressure
force, take, or pull apart	separate or cut with a tool, such as a sharp instrument
depart for someplace	go one's own way; move apart
go one's own way; move apart	discontinue an association or relation; go different ways
discontinue an association or relation; go different ways	separate into parts or portions

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