Soiree and Vesper

Soiree noun - A party of people assembled in the evening (usually at a private house).

Vesper and soiree are semantically related. In some cases you can replace term "Vesper" with "Soiree", this nouns are similar.

Vesper noun - A late afternoon or evening worship service.

Soiree and vesper are semantically related. Sometimes you can use "Soiree" instead a noun "Vesper".