Abyssinian vs Felis domesticus

Abyssinian and Felis domesticus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Abyssinian	Yes	No	No	No
Felis domesticus	Yes	No	No	No

As nouns, Felis domesticus is a hypernym of Abyssinian; that is, Felis domesticus is a word with a broader meaning than Abyssinian:

Abyssinian: a small slender short-haired breed of African origin having brownish fur with a reddish undercoat
Felis domesticus: any domesticated member of the genus Felis

Other hypernyms of Abyssinian include domestic cat, Felis catus, house cat.

Abyssinian (noun)	Felis domesticus (noun)
a small slender short-haired breed of African origin having brownish fur with a reddish undercoat	any domesticated member of the genus Felis