Modifiers matching headache:

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

Simple categories matching debilitating:

• pain,
• disease,
• drug,
• condition,
• addiction,
• illness,
• dysfunction,
• event,
• symptom,
• infection,
• pathology,
• problem,
• disorder,
• affliction,
• emotion,
• surgery,
• headache,
• situation,
• state,
• attribute,
• injury,
• sentiment,
• complication,
• process,
• consequence,