broncho vs mustang

broncho and mustang both are nouns.

Word	Noun	Adjective	Verb	Adverb
broncho	Yes	No	No	No
mustang	Yes	No	No	No

As nouns, mustang is a hypernym of broncho; that is, mustang is a word with a broader meaning than broncho:

broncho: an unbroken or imperfectly broken mustang
mustang: small hardy range horse of the western plains descended from horses brought by the Spanish

broncho (noun)	mustang (noun)
an unbroken or imperfectly broken mustang	small hardy range horse of the western plains descended from horses brought by the Spanish