Simple categories matching observable:

• quantity,
• science,
• possession,
• trait,
• property,
• attribute,
• variable,
• index,
• event,
• thing,
• token,
• product,
• location,
• action,
• artefact,
• density,
• entity,
• measure,
• behaviour,
• tradition,
• difference,
• behavior,
• characteristic,
• indicator,
• condition,
• error,
• object,
• information,
• process,
• data,
• response,
• phenomenon,
• body,
• distance,
• container,
• change,
• particle,
• outcome,
• structure,
• effect,
• result,
• skill,
• system,
• cue,
• medium,

Members with property observable:

• shape,
• color,
• sequence,
• composition,
• polarization,
• production_volume,
• body,
• weight,
• size,
• chemical,
• texture,
• biology,
• light,
• age,
• call,
• momentum,
• action_tendency,
• flying_schedule,
• papers,
• lifetime,
• osmotic_pressure,
• expenditure,
• sun,
• mass,
• tariff_level,
• co2,
• symptom,
• capacity,
• hierarchical_level,
• position,
• physics,
• jaguar,
• temperature,
• soil_depth,
• velocity_distribution,
• shape_change,
• product_characteristic,
• animal,
• bone_structure,
• fact,
• duration,
• population_pressure,
• employment,
• accent,
• volume_proportion,
• test,
• organelle,
• structure,
• organizational_structure,
• observed_color,
• luminous_galaxy,
• physical_disorder,
• gray_level,
• artifact,
• cell_mutation,
• mass_function,
• temperature_no,
• amplitude,
• fluid_velocity,
• correlation_factor,
• grape_variety,
• moisture_content,
• climate,
• headlight_effect,
• emotional_maturity,
• local_polarization,
• voice_intonation,
• encryption,
• momentum_distribution,
• force,
• fund_age,
• region,
• grace,
• past_earnings,
• parallax_distance,
• galaxy,
• school_attendance,
• building,
• backbone,
• sea,
• vibrational_spectrum,
• acceleration,
• energy_flux,
• energy_spectrum,
• penetration_depth,
• moon,
• phone,
• traumatic_injury,
• belt_use,
• proper_mass,
• green_function,
• examination,
• education,
• installation,
• observable_event,
• motor_activity,
• demographic_trait,
• ground_deformation,
• electron_density,
• omission,
• income,
• sign,
• retention,
• electromotive_force,
• x-ray_luminosity,
• service_quality,
• sales,
• critical_tumor,
• line_profile,
• apple,
• individual_chromosome,
• schooling,
• motion,
• facial_characteristic,
• number,
• death,
• cluster_temperature,
• opacity,
• sinking,
• empty_tomb,
• charcoal_staining,
• fluidity,
• internal_state,
• meet,
• watch,
• mineral,
• file,
• heat,
• physical_appearance,
• luminosity,
• clothes,
• electronic_absorption,
• cell_movement,
• physical_structure,
• physical_growth,
• phase,
• accountability,
• hardness,
• help,
• magnetic_property,
• customer-agent_interaction,
• wetness,
• angular_velocity,
• mobility,
• absence,
• raising_bid,
• eye_irritation,
• current_symbol,
• transient_climate,
• office_space,
• angular_momentum,
• scale_size,
• gaze,
• electron,
• colours,
• electric_field,
• facial_mimicry,
• radial_velocity,
• status_relationship,
• parental_background,
• social_event,
• network,
• reliability,
• public_display,
• judicial_decision,
• brain_state,
• inertia,
• self_care,
• event,
• comfortable_warmth,
• heat_capacity,
• vehicle,
• color_depth,
• mean_fitness,
• average,
• war,
• background,
• speech,
• intelligence,
• rabbit,
• body_position,
• nerve-fibre_stretching,
• mean_energy,
• habit,
• attractiveness,
• ear_shape,
• horse,
• employment_proposition,
• financial_result,
• inattentiveness,
• quality,
• verbal_label,
• quantity,
• chemical_composition,
• periodicity,
• fossil,
• hair_ribbon,
• race,
• magnetization,
• hair_color,
• time_history,
• colour_change,
• colors,
• stature,
• number_density,
• primary_output,
• production,
• length,
• load_interruption,
• perception,
• neel_temperature,
• smell,
• participation,
• structural_parameter,
• flexibility,
• display,
• arrest,
• boson,
• compton_reflection,
• foot_movement,
• local_temperature,
• ability,
• perseveration,
• line_strength,
• spectral_index,
• meson,
• sufficiency,
• magnitude,
• number_count,
• influence,
• planet,
• historical_change,
• apparent_magnitude,
• proton,
• body_shape,
• particle_mass,
• spectrum,
• matter,
• education_level,
• model,
• galaxy_flux,
• luminosity_distance,
• thing,
• economic_depression,
• gesture,
• log_file,
• efficiency,
• mental_ability,
• electromagnetic_emission,
• treatment,
• chemistry,
• line_intensity,
• wealth,
• small_acreage,
• pulse,
• demographic_characteristic,
• location,
• activity,
• conformation,
• rotation,
• behavior_change,
• reorganization,
• mean_yield,
• cumulative_incidence,
• hadron_spectrum,
• degradation_spectrum,
• form,
• magnetic_induction,
• radiance,
• pressure,
• price_movement,
• hair_texture,
• transmission_tower,
• mechanical_action,
• magnetic_field,
• external_gravity,
• voting_record,
• promotion,
• publication,
• company,
• white_shirt,
• molecular_weight,
• energy,
• vibration,
• message,
• demographic,
• wing_shape,
• specific_heat,
• bulk_compressibility,
• technical_change,
• parental_wealth,
• richness,
• sheen,
• potential,
• service_object,
• energy_consumption,
• effective_temperature,
• velocity_dispersion,
• successful_derivation,
• investment,
• physical_attractiveness,
• operating-system_resource,
• intensity,
• physical_feature,
• possession,
• stress,
• behaviour,
• demand_elasticity,
• geologic_event,
• management_commitment,
• phase_shift,
• house,
• arabic-language_proficiency,
• speech_characteristic,
• method_call,
• neutron_energy,
• energy_density,
• brightness,
• height,
• demand,
• ethnic_background,
• charge,
• preparation,
• teacher_education,
• eye_color,
• correlation,
• displacement,
• time_delay,
• contact_distance,
• aircraft_wing,
• variance,
• means,
• gain,
• proper_motion,
• speed,
• distance,
• response,
• flux,
• food,
• volatility_spillover,
• market_return,
• dependability,
• yield,
• presence,
• neutron,
• emission_spectrum,
• ownership,
• image_position,
• gaze_alternation,
• geography,
• output,
• preference_reversal,
• gender,
• love,
• race_diversity,
• manners,
• radius,
• skin,
• smog,
• visit,
• distortion,
• bmi,
• curvature,
• outdoor_durability,
• trust,
• wages,
• region_account,
• fire,
• answer_constraint,
• savings,
• angular_size,
• sector,
• ethnicity,
• table,
• event_viewer,
• star,
• velocity,
• allergy_symptom,
• cross_section,
• vision,
• task_times,
• temperature_increase,
• surface_temperature,
• labor_supply,
• price,
• task_assignment,
• deadbolt_lock,
• density,
• pulse_train,
• human,
• image_intensity,
• shift,
• taste,
• deeds,
• language,
• words,
• pump,
• attitude,
• sex,
• public_apathy,
• ethnic_affiliation,
• cleavage,
• role,
• fresh_blood,
• flight,
• motivation,
• compressibility,
• user_preference,
• interest,
• bread,
• technical_surveillance,
• behavior,
• momentum_flux,
• religion,
• waveform,
• permeability,
• voluntary_engagement,
• wind,
• movement,
• book,
• light_curve,
• delay,
• change,
• eeg_wave,
• x-ray_temperature,
• angular_distance,
• cortical_map,
• function,
• valve,
• prism,
• chair,
• response_function,
• skin_resistance,
• brain_chemistry,
• baryon,
• brain_activity,
• handwriting,
• appearance,
• volume,
• action,
• pole,
• jet_energy,
• clothing,
• performance,
• increased_persistence,
• capital_improvement,
• physical_function,
• seniority,
• usability,
• strength,
• fermion,
• consumption,
• lense,
• strain,
• deposit_profile,
• malignant_transformation,
• such_model,
• state,
• cholesterol_level,
• physical_particle,
• replication,
• preservation_demand,
• interest-rate_index,
• emergency_department,
• expression,
• assignment,
• economic_tie,
• finite_failure,
• magnetic_flow,
• decision,
• flow_depth,
• stimulus,
• over_window,
• polarization_curve,
• alliance,
• malleability,
• new_investment,
• current,
• color_change,
• sound,
• cloud_shape,
• occupation,
• distribution,
• stoppage,
• task_completion,
• gene,
• luster,
• hair_form,
• hadron_mass,
• thunder,
• bird,
• voluntary_action,
• mean,
• topographic_variance,
• consumer_characteristic,
• fan,
• proton_decay,
• output_realization,