1) Accessary 2) Accessory 3) Alternate Nazi Germany novel 4) Confederate 5) Fellow worker 6) Henchman 7) Partner in crime 8) Person aiding an enemy 9) Someone who assists in a plot 1) Ally 2) Assistant 3) Associate 4) Auxiliary 5) Collaborationist 6) Colleague 7) Conspirator 8) Cooperator 9) Friend 10) Henchman 11) Pardner 12) Partner 13) Quisling 14) Traitor 
• (n.) An associate in labor, especially in literary or scientific labor.
Col·lab'o·ra`tor noun [ Latin collaborare to labor together; col- + laborare to labor: confer French collaborateur .] An associate in labor, especially in literary or scientific labor. 
[n] - someone who collaborates with an enemy occupying force 2. [n] - an associate who works with others toward a common goal
collaborator, collaborators 1. Working together; such as, to produce books. 2. An associate who works with others toward a common goal. 3. Someone who collaborates with an enemy occupying force. 4. Anyone who assists in a plot. 5. A person who works with someone else for a special purpose.
An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
A person who who aided the Nazis in their plans to destroy Jews.
quisling noun someone who collaborates with an enemy occupying forcecooperator noun an associate who works with others toward a common goal; `the musician and the librettist were collaborators`