Confidant, Consultant, Controller, Counsel, Custodian, Display, Examine, Expert, Follow, Foreman, Ganger, Grapevine, Guard, Guardian, Guide, Ham, Head, Headman, Informant, Informer, Inquirer, Inspect, Inspector, Instructor, Intern, Interviewee, Learner, Lookout, Meddler, Mentor, Mixer, Mouthpiece, Observe, Overhaul, Overlook, Oversee, Overseer, Peruse, Postmortem, Prefect, Press, Proctor, Publisher, Pupil, Radio, Record, Reporter, Review, Scan, Scholar, Sentinel, Sentry, Jeremiah, Adviser, Announcer, Audit, Auditor, Authority, Autopsy, Boatswain, Boss, Cameraman, Canvass, Channel, Check, Chief, Communicant, Communicator, Comptroller, Signalman, Size, Source, Spokesman, Student, Studier, Study, Super, Superintend, Superintendent, Supervise, Supervisor, Survey, Surveyor, Taskmaster, Teacher, Television, Teller, Tipster, Tout, Trace, Track, Trainee, Vet, Visitor, Watch, Watchdog, Witness