musca volitans vs muscae volitantes

musca volitans and muscae volitantes both are nouns.

Word	Noun	Adjective	Verb	Adverb
musca volitans	Yes	No	No	No
muscae volitantes	Yes	No	No	No

As nouns, musca volitans and muscae volitantes are synonyms defined as:

musca volitans and muscae volitantes: spots before the eyes caused by opaque cell fragments in the vitreous humor and lens

Other synonyms of musca volitans include floater, spots.

musca volitans (noun)	muscae volitantes (noun)
spots before the eyes caused by opaque cell fragments in the vitreous humor and lens	spots before the eyes caused by opaque cell fragments in the vitreous humor and lens