Modifiers matching perturbation:

• random,
• environmental,
• external,
• minor,
• small,
• major,
• dynamic,
• related,
• mechanical,
• uncertain,
• anthropogenic,
• under,
• artificial,
• anatomic,
• physiological,
• acute,
• therapeutic,
• periodic,
• additional,
• novel,
• dynamical,
• severe,
• optical,
• electrical,
• local,
• mental,
• chemical,
• chronic,
• uniform,
• excessive,
• physical,
• strong,
• psychological,
• electric,
• natural,

Simple categories matching random:

• structure,
• object,
• event,
• subject,
• number,
• catastrophe,
• means,
• state,
• perturbation,
• game,
• thing,
• process,
• conductor,
• space,
• particle,
• accident,
• error,
• disruption,
• stuff,
• signal,
• motion,
• packing,
• system,
• activity,
• device,
• goody,
• array,
• item,
• group,
• crime,
• solid,
• part,
• situation,
• interference,
• alteration,
• incident,
• furnishing,
• phase,
• behavior,
• topic,
• shape,
• parameter,
• magazine,
• evolution,
• scene,
• terms,
• toy,
• light,
• condition,
• sport,
• fault,
• field,
• sound,
• order,
• equipment,
• attribute,
• drawing,
• search,
• song,
• clothes,
• experience,
• works,
• movement,
• quantity,
• component,
• hardware,
• force,
• material,
• mutation,
• medium,
• mechanism,
• content,
• selection,
• model,
• fluctuation,
• violence,
• variation,
• act,
• noise,
• set,
• character,
• place,
• fluid,
• property,
• tragedy,
• people,
• message,
• impurity,
• cause,
• merchandise,
• elements,
• piece,
• block,
• surface,
• data,
• pattern,
• change,
• influence,
• form,
• anachronism,
• sum,
• characteristic,
• phenomenon,
• artifact,
• times,
• opponent,
• information,
• animal,
• variable,
• generator,
• shock,
• disturbance,
• area,
• procedure,
• failure,
• location,
• occurrence,
• diversion,
• feeder,
• drift,