evensong vs Evening Prayer

evensong and Evening Prayer both are nouns.

Word	Noun	Adjective	Verb	Adverb
evensong	Yes	No	No	No
Evening Prayer	Yes	No	No	No

As nouns, evensong and Evening Prayer are synonyms defined as:

evensong and Evening Prayer: (Anglican Church) a daily evening service with prayers prescribed in the Book of Common Prayer

evensong (noun)	Evening Prayer (noun)
(Anglican Church) a daily evening service with prayers prescribed in the Book of Common Prayer	(Anglican Church) a daily evening service with prayers prescribed in the Book of Common Prayer
the sixth of the seven canonical hours of the divine office; early evening; now often made a public service on Sundays