Vesper and Venus

Vesper noun - A late afternoon or evening worship service.

Venus and vesper are semantically related In some cases you can use "Venus" instead a noun "Vesper".

Venus noun - 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'.

Vesper and Venus are semantically related in planet seen in west at sunset topic. You can use "Vesper" instead a noun "Venus".