Urania vs Venus

Urania and Venus both are nouns.

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

As nouns, Urania and Venus are synonyms defined as:

Urania (noun)	Venus (noun)
(Greek mythology) the Muse of astronomy	type genus of the family Veneridae: genus of edible clams with thick oval shells
goddess of love; counterpart of Greek Aphrodite	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