Felis domesticus vs Felis catus

Felis domesticus and Felis catus both are nouns.

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

As nouns, Felis domesticus and Felis catus are synonyms defined as:

Felis domesticus and Felis catus: any domesticated member of the genus Felis

Other synonyms of Felis domesticus include domestic cat, house cat.

Felis domesticus (noun)	Felis catus (noun)
any domesticated member of the genus Felis	any domesticated member of the genus Felis