Simple categories matching spontaneous:

• event,
• movement,
• violence,
• action,
• use,
• emotion,
• activity,
• mutation,
• form,
• experience,
• occurrence,
• change,
• expression,
• resistance,
• behavior,
• speech,
• animation,
• reaction,

Members with property spontaneous:

• riot,
• numbness,
• monologue,
• elation,
• limb_movement,
• laughter,
• instant_interaction,
• mutation,
• speech,
• fibrillation_potential,
• fear,
• celebration,
• feeding,
• anger,
• parkinson_disease,
• political_riot,
• breakthrough,
• report,
• interpretive_hike,
• locomotor_activity,
• capture,
• mass_strike,
• breakdown,
• lecture,
• snow_storm,
• circle_dancing,
• foot,
• dance_sequence,
• dove_release,
• adhesion,
• oscillation,
• art_exhibit,
• lecture_note,
• shock,
• typical_play,
• protest_action,
• answer,
• accident,
• positive_wave,
• natural_disaster,
• market,
• screening,
• dancing_contest,
• triage,
• gesture,
• singing,
• chromosomal_rearrangement,
• discussion,
• bike_ride,
• flood,
• throwing_rock,
• sharp_wave,
• exothermic_event,
• trip,
• manifestation,
• american_wirehair,
• sudden_variation,
• face_washing,
• afternoon_workshop,
• body_saccade,
• alarm_notification,
• sweet_orange,
• fibrillation,
• guitar_playing,
• crisis_management,
• disaster,
• playing_pool,
• casual_conversation,
• festival,
• auger_transition,
• surprise,
• play,
• twisting,
• head_rotation,
• flexor_movement,
• party,
• withdrawal,
• terrorism,
• sexual_excitement,
• hike,
• house_fire,
• brainstorming_activity,
• configuration_change,
• pronator_drift,
• gait,
• demonstration,
• gathering,
• bloody_riot,
• locomotion,
• shorter_words,
• sport,
• random_hike,
• metabolic_process,
• landslide,
• rage,
• street_protest,
• interview,
• pickup,
• faster_speech,
• counting,
• conversation,
• action,
• school_visit,
• home_visit,
• big_bang,
• deletion,
• allelic_mutation,
• hiding,
• notification,
• gross_movement,
• amplitude,
• uprising,
• family_event,
• dancing,
• strike,
• street_photography,
• shift,
• cooking_class,
• movement_speed,
• rioting,
• activity,
• hospitalization,
• kayak_run,
• breaking_news,
• mass_protest,
• mouth,