Matins and Vespers

Matins noun - The first canonical hour; at daybreak.

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

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

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