split up vs divorce

split up and divorce both are nouns.

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

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

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

split up (noun)	divorce (noun)
an increase in the number of outstanding shares of a corporation without changing the shareholders' equity	the legal dissolution of a marriage

split up (verb)	divorce (verb)
become separated into pieces or fragments	get a divorce; formally terminate a marriage
get a divorce; formally terminate a marriage	part; cease or break association with
discontinue an association or relation; go different ways
separate into parts or portions