wrangle vs bust-up

wrangle and bust-up both are nouns.

Word	Noun	Adjective	Verb	Adverb
wrangle	Yes	No	Yes	No
bust-up	Yes	No	No	No

As nouns, bust-up is a hyponym of wrangle; that is, bust-up is a word with a more specific, narrower meaning than wrangle:

Other hyponyms of wrangle include affray, altercation, fracas, bicker, bickering, fuss, pettifoggery, spat, squabble, tiff.

wrangle (noun)	bust-up (noun)
an instance of intense argument (as in bargaining)	a serious quarrel (especially one that ends a friendship)
an angry dispute

wrangle (verb)	bust-up (verb)
to quarrel noisily, angrily or disruptively
herd and care for