Modifiers matching perturbation:

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

Simple categories matching mental:

• competency,
• study,
• trauma,
• state,
• process,
• procedure,
• stress,
• hazard,
• disorder,
• condition,
• cause,
• activity,
• evidence,
• feeling,
• shock,
• formation,
• reasoning,
• production,
• organization,
• ability,
• transformation,
• disability,
• device,
• function,
• status,
• material,
• endeavor,
• readiness,
• quality,
• initiative,
• event,
• elements,
• nuisance,
• catastrophe,
• challenge,
• service,
• discipline,
• disease,
• strain,
• concept,
• force,
• implementation,
• body,
• signal,
• occurrent,
• arts,
• entity,
• disposition,
• game,
• value,
• labor,
• content,
• upset,
• program,
• pleasure,
• trait,
• happening,
• inspiration,
• feature,
• effort,
• crisis,
• impurity,
• representation,
• structure,
• quantity,
• object,
• situation,
• occupation,
• measure,
• assets,
• animal,
• contaminant,
• thought,
• filter,
• chemical,
• energy,
• attitude,
• sensation,
• fault,
• work,
• performance,
• mechanism,
• gas,
• stimulus,
• training,
• values,
• blockage,
• act,
• aptitude,
• principle,
• aberration,
• disturbance,
• organisation,
• treatment,
• science,
• phenomenon,
• preparation,
• model,
• fact,
• culture,
• torture,
• conception,
• component,
• stimulation,
• confusion,
• trouble,
• factor,
• sin,
• skill,
• design,
• system,
• goal,
• operations,
• sound,
• distress,
• suffering,
• medium,
• source,
• testing,
• unit,
• grouping,
• cue,
• mistake,
• ailment,
• movement,
• exposure,
• difficulty,
• reaction,
• perception,
• interference,
• characteristic,
• intrusion,
• data,
• concern,
• problem,
• development,
• emotion,
• perturbation,
• attainment,
• life,
• conflict,
• power,
• constituent,
• image,
• action,
• behavior,
• equipment,
• illness,
• noise,
• notion,
• task,
• influence,
• decline,
• inquiry,
• management,
• abnormality,
• adaptation,
• abuse,
• mammal,
• wellbeing,
• research,
• symptom,
• help,
• change,
• exercise,
• operation,
• cruelty,
• improvement,
• use,
• practice,
• discomfort,
• injury,
• property,
• handicap,
• control,
• modification,
• character,
• issue,
• health,
• malady,
• variable,
• impact,
• stressor,
• pain,
• space,
• experience,
• information,
• pattern,
• stage,
• consideration,
• staff,
• expenditure,
• imagery,
• matter,
• impression,
• relationship,
• cognition,
• set,
• degradation,
• facility,
• excitation,
• carcinogen,
• capability,
• constant,
• parameter,
• impairment,
• depression,
• load,
• pathology,
• attribute,
• sign,
• agency,
• plan,
• knowledge,
• processing,
• faculty,
• agitation,
• agent,
• causation,
• hindrance,
• care,
• abstraction,