Eventide and Vesper

Eventide noun - The time from when the sun begins to set to the onset of total darkness.

Vesper is a synonym for eventide in start topic. In some cases you can use "Vesper" instead a noun "Eventide", when it comes to topics like night.

Vesper noun - A late afternoon or evening worship service.

Eventide is a synonym for vesper in start topic. You can use "Eventide" instead a noun "Vesper", if it concerns topics such as night, evening.