Modifiers matching toxin:

• potent,
• harmful,
• biochemical,
• bacterial,
• biological,
• soluble,
• natural,
• herbal,
• microbial,
• organic,
• deadly,
• external,
• diarrheal,
• environmental,
• possible,
• carcinogenic,
• local,
• toxic,
• chemical,
• exogenous,
• respiratory,
• dangerous,
• exotic,
• common,
• potential,
• major,
• invertebrate,
• fungal,

Simple categories matching respiratory:

• cancer,
• allergen,
• treatment,
• disease,
• infection,
• condition,
• disorder,
• tissue,
• sound,
• machine,
• care,
• cover,
• secretion,
• sensitivity,
• illness,
• pathogen,
• component,
• service,
• product,
• complication,
• gas,
• pathology,
• reflex,
• equipment,
• failure,
• problem,
• tube,
• effort,
• hazard,
• drug,
• protection,
• system,
• event,
• symptom,
• virus,
• muscle,
• support,
• organ,
• death,
• cell,
• signal,
• difficulty,
• depressant,
• passage,
• connector,
• toxin,
• chain,
• structure,
• control,
• carcinogen,
• interval,