| abettor(noun, person, representative, assistant, manager) |
| acolyte(noun, assistant, deputy) |
| aid(noun, feature, influence, issue, servant) |
| aide-de-camp(noun, assistant, servant) |
| foreman(noun, control, manage, boss, leader) |
| impresario |
| interceder |
| intercessor |
| internuncio(noun, representative, carrier, deputy, herald) |
| link(noun, fastener) |
| mean(noun, means) |
| method(vehicle, means, equipment, tackle, channel) |
| middle man(business, person, representative) |
| mole(noun, plant, warning, spy, operative) |
| origin(noun, cause, reason, base, matter) |
| originator(noun, reason, element, matter, source) |
| prime mover(noun, expression, idiom, cause, reason) |
| producer(noun, cause, reason, base, element) |
| rep(noun, representative, member, deputy, delegate) |
| salesperson(noun, person, representative, assistant, attendant) |