Modifiers matching occasion:

• formal,
• particular,
• musical,
• special,
• official,
• single,
• elegant,
• stressful,
• festive,
• celebratory,
• happy,
• memorable,
• solemn,
• significant,
• joyous,
• dressy,
• auspicious,
• emotional,
• large,
• extraordinary,
• historical,
• unique,
• oriental,
• serious,
• wonderful,
• unusual,
• upcoming,
• meaningful,
• social,
• infrequent,
• outdoor,
• major,
• exclusive,
• sad,
• important,
• private,
• joyful,
• organized,
• romantic,
• personal,
• extra,
• public,
• big,
• informal,
• crowded,

Simple categories matching stressful:

• behavior,
• event,
• profession,
• appointment,
• condition,
• emotion,
• conflict,
• incident,
• situation,
• therapy,
• state,
• posture,
• circumstances,
• manipulation,
• job,
• consequence,
• procedure,
• circumstance,
• occasion,
• difficulty,
• habitat,
• setting,
• symptom,
• period,
• sport,
• intervention,
• agent,
• activity,
• work,
• stimulus,
• episode,
• times,
• task,
• process,
• experience,
• treatment,
• motion,
• change,
• occurrence,
• time,
• exertion,