Congregation =
5712. עֵדָה ʿêdâh, ay-daw´; fem. of 5707 in the orig. sense of fixture; a stated assemblage (spec. a concourse, or gen. a family or crowd):—assembly, company, congregation, multitude, people, swarm. Comp. 5713.
Strong, J. (2009). A Concise Dictionary of the Words in the Greek Testament and The Hebrew Bible (Vol. 2, p. 85).
Church =
1577. ἐκκλησία ĕkklēsia, ek-klay-see´-ah; from a comp. of 1537 and a der. of 2564; a calling out, i.e. (concr.) a popular meeting, espec. a religious congregation (Jewish synagogue, or Chr. community of members on earth or saints in heaven or both):—assembly, church.
Strong, J. (2009). A Concise Dictionary of the Words in the Greek Testament and The Hebrew Bible (Vol. 1, p. 26)