Modifiers matching observer:

• casual,
• objective,
• familiar,
• trained,
• foreign,
• external,
• unofficial,
• lay,
• concerned,
• social,
• careful,
• responsible,
• outside,
• naive,
• special,
• dedicated,
• contemporary,
• inexperienced,
• interested,
• everyday,
• primary,
• impartial,
• knowledgeable,
• influential,
• independent,
• skilled,
• key,
• professional,
• experienced,

Simple categories matching skilled:

• worker,
• people,
• labourer,
• labor,
• craftsman,
• trade,
• laborer,
• professional,
• position,
• vocation,
• work,
• artisan,
• interpreter,
• artist,
• activity,
• person,
• volunteer,
• care,
• service,
• industry,
• procedure,
• individual,
• game,
• technician,
• developer,
• searcher,
• profession,
• animal,
• performance,
• group,
• behaviour,
• advisor,
• personnel,
• labour,
• specialist,
• occupation,
• freelancer,
• manipulator,
• applicant,
• technologist,
• gathering,
• works,
• inhabitant,
• training,
• man,
• help,
• performer,
• craft,
• employment,
• action,
• therapy,
• agent,
• observer,
• librarian,
• facility,
• user,
• analyst,
• duty,
• qualification,
• metalworker,
• candidate,
• practitioner,
• area,
• expert,
• operator,
• task,
• player,
• tradesman,
• sector,
• knowledge,
• job,
• behavior,
• employee,
• slave,
• discipline,
• movement,