We don't have synonyms for evensongs yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are evensong, evenings and evenson.
(n) :
A religious service, most commonly seen in the Anglican or Episcopal Church, that takes place in the early hours of the evening; originally, and sometimes still, an alternative name for vespers or a service combining vespers and compline.
(n) :
A religious service, most commonly seen in the Anglican or Episcopal Church, that takes place in the early hours of the evening; originally, and sometimes still, an alternative name for vespers or a service combining vespers and compline.