pony vs Indian pony

pony and Indian pony both are nouns.

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

As nouns, Indian pony is a hyponym of pony; that is, Indian pony is a word with a more specific, narrower meaning than pony:

Other hyponyms of pony include mustang, cayuse.

pony (noun)	Indian pony (noun)
any of various breeds of small gentle horses usually less than five feet high at the shoulder	a small native range horse
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)