1) Accumulated 2) Amassed 3) Assemble 4) Assembled 5) Concentrated 6) Gather 7) Massed 8) Meet 9) Muster 1) Accumulated 2) Amassed 3) Assembled 4) Collected 5) Concentrated 6) Foregather 7) Massed 8) To assemble 9) To come together 10) To meet 
gathered into close proximity
• (v. i.) To come together; to assemble; to meet. • (a.) Collected; compact; close. • (v. t.) To collect into an assembly or assemblage; to assemble; to bring into one place, or into a united body; to gather together; to mass; to compact.
Con'gre·gate adjective [ Latin congregatus , past participle of congregare to congregate; on- + gregare to collect into a flock, from grex flock, herd. See Gregarious .] Collected; compact; close. [ R.] Bacon. 
gathered into close proximity
verb come together, usually for a purpose; `The crowds congregated in front of the Vatican on Christmas Eve`
come together, usually for a purpose[Literary terms] come together, usually for a purpose