tabby vs Felis catus

tabby and Felis catus both are nouns.

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

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

Other hypernyms of tabby include domestic cat, Felis domesticus, house cat.

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

Other hypernyms of tabby include domestic cat, Felis domesticus, house cat.

tabby (noun)	Felis catus (noun)
a cat with a grey or tawny coat mottled with black	any domesticated member of the genus Felis
female cat

tabby (adjective)	Felis catus (adjective)
having a grey or brown streak or a pattern or a patchy coloring; used especially of the patterned fur of cats