separate vs split

separate and split both are nouns.

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

As verbs, split is a hyponym of separate; that is, split is a word with a more specific, narrower meaning than separate:

As verbs, separate and split are synonyms defined as:

Other synonyms of separate include part.

As verbs, separate and split are synonyms defined as:

Other synonyms of separate include carve up, dissever, divide, split up.

As verbs, separate and split are synonyms defined as:

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

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

separate (noun)	split (noun)
a garment that can be purchased separately and worn in combinations with other garments	division of a group into opposing factions
a separately printed article that originally appeared in a larger publication	the act of rending or ripping or splitting something
	extending the legs at right angles to the trunk (one in front and the other in back)
	an increase in the number of outstanding shares of a corporation without changing the shareholders' equity
	(tenpin bowling) a divided formation of pins left standing after the first bowl
	a dessert of sliced fruit and ice cream covered with whipped cream and cherries and nuts
	an opening made forcibly as by pulling apart
	a lengthwise crack in wood
	a promised or claimed share of loot or money
	a bottle containing half the usual amount

separate (adjective)	split (adjective)
independent; not united or joint	(especially of wood) cut or ripped longitudinally with the grain
standing apart; not attached to or supported by anything	having been divided; having the unity destroyed
separated according to race, sex, class, or religion
have the connection undone; having become separate

separate (verb)	split (verb)
become separated into pieces or fragments	come open suddenly and violently, as if from internal pressure
divide into two or more branches so as to form a fork	separate or cut with a tool, such as a sharp instrument
arrange or order by classes or categories	go one's own way; move apart
mark as different	discontinue an association or relation; go different ways
move or break apart	separate into parts or portions
force, take, or pull apart
divide into components or constituents
go one's own way; move apart
make a division or separation
treat differently on the basis of sex or race
separate into parts or portions
discontinue an association or relation; go different ways
act as a barrier between; stand between