stablemate vs Equus caballus

stablemate and Equus caballus both are nouns.

Word	Noun	Adjective	Verb	Adverb
stablemate	Yes	No	No	No
Equus caballus	Yes	No	No	No

As nouns, Equus caballus is a hypernym of stablemate; that is, Equus caballus is a word with a broader meaning than stablemate:

stablemate: a horse stabled with another or one of several horses owned by the same person
Equus caballus: solid-hoofed herbivorous quadruped domesticated since prehistoric times

Other hypernyms of stablemate include horse.

stablemate (noun)	Equus caballus (noun)
a horse stabled with another or one of several horses owned by the same person	solid-hoofed herbivorous quadruped domesticated since prehistoric times