is a specific kind of: body.

is a broader term that covers: Curia | top brass | executive | bench, judiciary | county council | government officials, officialdom | management.

has as a part: hierarchy, pecking order, power structure.

is a part of: authorities, government, regime.

has as a member: advisory board, planning board.

derivation: coordinate, organise, organize | direct, engineer, mastermind, orchestrate, organise, organize | administer, administrate | organise, organize | form, organise, organize.