Venus vs Urania

Venus and Urania both are nouns.

Word	Noun	Adjective	Verb	Adverb
Venus	Yes	No	No	No
Urania	Yes	No	No	No

As nouns, Venus and Urania are synonyms defined as:

Venus (noun)	Urania (noun)
type genus of the family Veneridae: genus of edible clams with thick oval shells	(Greek mythology) the Muse of astronomy
the second nearest planet to the sun; it is peculiar in that its rotation is slow and retrograde (in the opposite sense of the Earth and all other planets except Uranus); it is visible from Earth as an early `morning star' or an `evening star'	goddess of love; counterpart of Greek Aphrodite
goddess of love; counterpart of Greek Aphrodite