Equus caballus vs equid

Equus caballus and equid both are nouns.

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

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

Equus caballus: solid-hoofed herbivorous quadruped domesticated since prehistoric times
equid: hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck

Other hypernyms of Equus caballus include equine.

Equus caballus (noun)	equid (noun)
solid-hoofed herbivorous quadruped domesticated since prehistoric times	hoofed mammals having slender legs and a flat coat with a narrow mane along the back of the neck