G4864 συναγωγή (synagōgḗ)

KJV renderings: assembly, congregation, synagogue
Strong's definition: an assemblage of persons; specially, a Jewish "synagogue" (the meeting or the place); by analogy, a Christian church
Derivation: from (the reduplicated form of) G4863 (συνάγω);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.