split up vs separate

split up and separate both are nouns.

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

As verbs, split up and separate are synonyms defined as:

Other synonyms of split up include break, come apart, fall apart.

As verbs, separate is a hypernym of split up; that is, separate is a word with a broader meaning than split up:

Other hypernyms of split up include break, break up, part, split, split up.

As verbs, split up and separate are synonyms defined as:

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

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

As verbs, split up and separate are synonyms defined as:

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

split up (noun)	separate (noun)
an increase in the number of outstanding shares of a corporation without changing the shareholders' equity	a garment that can be purchased separately and worn in combinations with other garments
	a separately printed article that originally appeared in a larger publication

split up (adjective)	separate (adjective)
	independent; not united or joint
	standing apart; not attached to or supported by anything
	separated according to race, sex, class, or religion
	have the connection undone; having become separate

split up (verb)	separate (verb)
become separated into pieces or fragments	become separated into pieces or fragments
get a divorce; formally terminate a marriage	divide into two or more branches so as to form a fork
discontinue an association or relation; go different ways	arrange or order by classes or categories
separate into parts or portions	mark as different
	move or break apart
	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