Eventide and Vespers

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

Vespers and eventide are semantically related. In some cases you can use "Vespers" instead a noun "Eventide".

Vespers noun - The sixth of the seven canonical hours of the divine office; early evening; now often made a public service on Sundays.

Eventide and vespers are semantically related. You can use "Eventide" instead a noun "Vespers".