Felis domesticus vs house cat

Felis domesticus and house cat both are nouns.

Word	Noun	Adjective	Verb	Adverb
Felis domesticus	Yes	No	No	No
house cat	Yes	No	No	No

As nouns, Felis domesticus and house cat are synonyms defined as:

Felis domesticus and house cat: any domesticated member of the genus Felis

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

Felis domesticus (noun)	house cat (noun)
any domesticated member of the genus Felis	any domesticated member of the genus Felis