Modifiers matching sensation:

• undesirable,
• secondary,
• homeostatic,
• physical,
• unpleasant,
• environmental,
• distressing,
• unusual,
• subjective,
• private,
• mechanical,
• uncomfortable,
• unanalyzable,
• abnormal,
• noxious,
• negative,
• localized,
• simple,
• internal,
• intense,
• elementary,
• sensory,
• mental,
• somatic,
• special,
• genital,
• external,
• affective,
• basic,
• active,
• ordinary,
• multiple,
• everyday,
• perceptual,
• acoustic,
• pleasurable,
• visceral,
• strange,
• transient,
• annoying,
• morbid,
• tactile,
• gastric,
• distinct,
• cutaneous,
• proprioceptive,
• painful,
• seasonal,
• strong,
• experienced,
• pathological,
• neurological,
• common,
• optical,
• extreme,
• severe,
• local,
• complex,

Simple categories matching noxious:

• animal,
• element,
• particle,
• fumes,
• substance,
• metal,
• industry,
• contaminant,
• agent,
• microorganism,
• insect,
• gas,
• sensation,
• fauna,
• carbide,
• fluid,
• creature,
• beast,
• establishment,
• stimulation,
• odor,
• effluent,
• constituent,
• bird,
• salt,
• organism,
• nature,
• residue,
• chemical,
• event,
• rodent,
• material,
• plant,
• component,
• weeds,
• scavenger,
• pest,
• germ,
• stimulus,
• solvent,
• use,
• action,
• consequence,
• energy,
• symptom,
• metabolite,
• condition,
• facility,
• macromolecule,
• drug,
• compound,