Simple categories matching spontaneous:

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

Members with property spontaneous:

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