FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

sunagoge συναγωγή — soon-ag-o-gay' — from (the reduplicated form of) 4863; an assemblage of persons; specially, a Jewish "synagogue" (the meeting or the place); by analogy, a Christian church:--assembly, congregation, synagogue.

see GREEK for 4863