Musca domestica vs Musca

Musca domestica and Musca both are nouns.

Word	Noun	Adjective	Verb	Adverb
Musca domestica	Yes	No	No	No
Musca	Yes	No	No	No

Musca domestica (noun)	Musca (noun)
common fly that frequents human habitations and spreads many diseases	type genus of the Muscidae: houseflies
	a small constellation in the polar region of the Southern Hemisphere near the Southern Cross and Chamaeleon