Evensong and Vespers

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

Vespers is a synonym for evensong. In some cases you can use "Vespers" instead a noun "Evensong". popular alternative

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

Evensong is a synonym for vespers in prayer topic. You can use "Evensong" instead a noun "Vespers", if it concerns topics such as worship, evening prayer.