Modifiers matching reflex:

• automatic,
• primitive,
• physiological,
• systemic,
• autonomic,
• nasal,
• cardiovascular,
• nervous,
• respiratory,
• proprioceptive,
• involuntary,
• complex,
• simple,

Simple categories matching respiratory:

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