Modifiers matching headache:

• common,
• serious,
• primary,
• secondary,
• intense,
• debilitating,
• throbbing,
• paroxysmal,
• chronic,
• psychosomatic,
• severe,
• vascular,
• episodic,
• persistent,
• underlying,
• recurrent,
• simple,
• major,

Simple categories matching severe:

• weather,
• tb,
• injury,
• patient,
• disease,
• condition,
• cytopenia,
• damage,
• arthritis,
• trauma,
• infection,
• reaction,
• illness,
• warning,
• disorder,
• form,
• storm,
• event,
• phenomenon,
• offense,
• case,
• psychosis,
• accident,
• perturbation,
• misconduct,
• diarrhea,
• headache,
• anomaly,
• hazard,
• discomfort,
• inflammation,
• hypercapnia,
• symptom,
• complication,
• intoxication,
• toxicity,
• disaster,
• sign,
• offence,
• conduct,
• infraction,
• stress,
• hardship,
• manifestation,
• anxiety,
• hypoxia,
• penalty,
• lesion,
• occurrence,
• malaria,
• stage,
• arrhythmia,
• atmosphere,
• acne,
• behavior,
• misrepresentation,
• mutation,
• attack,
• defect,
• state,
• circumstance,
• deformation,
• infringement,
• behaviour,
• entity,
• area,
• wound,
• dysfunction,
• elements,
• difficulty,
• abnormality,
• action,
• ache,
• crime,
• punishment,
• problem,
• handicap,
• pain,
• upset,
• conflict,
• dermatosis,
• circumstances,
• consequence,
• hypocalcemia,
• fire,
• challenge,
• emotion,
• sanction,
• disability,
• windstorm,
• ailment,
• bias,
• interaction,
• activity,
• syndrome,
• impact,
• duty,
• pathology,
• blemish,
• infirmity,
• harm,
• sensation,
• sequela,
• group,
• violation,
• vibration,
• process,
• malnutrition,
• asthma,
• change,
• work,
• disturbance,
• incident,
• harassment,
• morbidity,
• experience,
• situation,
• impairment,
• depression,
• measure,
• abuse,
• constraint,