Consociate

·vi To form an ecclesiastical consociation.

II. Consociate ·vt To unite in an ecclesiastical consociation.

III. Consociate ·noun An associate; an Accomplice.

IV. Consociate ·vi To be allied, confederated, or associated; to Coalescence.

V. Consociate ·vt To bring into alliance, confederacy, or relationship; to bring together; to Join; to Unite.

to consociate
To unite in an assembly or convention, as pastors and messengers or delegates of churches.--Webster....

Dictionary of American Words And Phrases by John Russell Bartlett.