Modifiers matching episode:

• acute,
• tragic,
• traumatic,
• volcanic,
• single,
• symptomatic,
• infrequent,
• unfortunate,
• past,
• new,
• unpredictable,
• historical,
• physiological,
• interesting,
• catastrophic,
• chaotic,
• multiple,
• meteorological,
• sudden,
• major,
• special,
• memorable,
• violent,
• criminal,
• disastrous,
• painful,
• cardiovascular,
• geological,
• tectonic,
• ischaemic,
• medical,
• textual,
• neurological,
• biblical,
• stressful,
• related,
• exciting,
• periodic,
• negative,

Simple categories matching memorable:

• function,
• event,
• item,
• production,
• story,
• occasion,
• episode,
• activity,
• keepsake,
• experience,
• stuff,
• date,
• holiday,