Vespers as a noun is the sixth of the seven canonical hours while Evensong as a noun is a religious service, most commonly seen in the anglican or episcopal church, that takes place in the early hours of the evening.
Part of speech: noun
Definition: The sixth of the seven canonical hours
Part of speech: noun
Definition: A religious service, most commonly seen in the Anglican or Episcopal Church, that takes place in the early hours of the evening.
We hope you now know whether to use Vespers or Evensong in your sentence.