break away vs split

break away is not a noun while split is a noun.

Word	Noun	Adjective	Verb	Adverb
break away	No	No	Yes	No
split	Yes	Yes	Yes	No

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

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

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

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

break away (noun)	split (noun)
	division of a group into opposing factions
	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

break away (adjective)	split (adjective)
	(especially of wood) cut or ripped longitudinally with the grain
	having been divided; having the unity destroyed

break away (verb)	split (verb)
break off (a piece from a whole)	come open suddenly and violently, as if from internal pressure
flee; take to one's heels; cut and run	separate or cut with a tool, such as a sharp instrument
move away or escape suddenly	go one's own way; move apart
withdraw from an organization or communion	discontinue an association or relation; go different ways
interrupt a continued activity	separate into parts or portions