cayuse vs pony

cayuse and pony both are nouns.

Word	Noun	Adjective	Verb	Adverb
cayuse	Yes	No	No	No
pony	Yes	No	No	No

As nouns, pony is a hypernym of cayuse; that is, pony is a word with a broader meaning than cayuse:

cayuse (noun)	pony (noun)
a small native range horse	any of various breeds of small gentle horses usually less than five feet high at the shoulder
	a range horse of the western United States
	an informal term for a racehorse
	a small glass adequate to hold a single swallow of whiskey
	a literal translation used in studying a foreign language (often used illicitly)