Category Nuances for null:

• serious,
• medical,
• inflammatory,
• uncontrolled,
• preexisting,
• recent,
• viable,
• confidential,
• risky,
• dangerous,
• modern,
• uncommon,
• secondary,
• chronic,
• viral,
• diverse,
• nasty,
• economic,
• natural,
• prokaryotic,
• physical,
• invisible,
• common,
• vaginal,
• lethal,
• deadly,
• pediatric,
• exogenous,
• infectious,
• exotic,
• progressive,
• lexical,
• clinical,
• eukaryotic,
• oral,
• familiar,
• latent,
• acquired,
• persistent,
• immunological,
• real,
• political,
• severe,
• harmful,
• concurrent,
• endocrine,
• multifactorial,
• single,
• organic,
• transmissible,
• direct,
• expert,
• concerned,
• devastating,
• debilitating,
• problematic,
• foreign,
• wonderful,
• microscopic,
• diagnostic,
• complicated,
• cachectic,
• curable,
• hidden,
• venereal,
• microbial,
• genital,
• airborne,
• individual,
• psychiatric,
• placental,
• miscellaneous,
• disadvantaged,
• new,
• out,
• structural,
• older,
• unwanted,
• episodic,
• biological,
• vital,
• social,
• immune,
• immunosuppressed,
• general,
• prolonged,
• nutritional,
• immunocompromised,
• rare,
• permanent,
• identifiable,
• philanthropic,
• mucosal,
• organisational,
• perinatal,
• sensitive,
• compromising,
• relevant,
• outside,
• systemic,
• cultured,
• long,
• cellular,
• haematological,
• autoimmune,
• intracellular,
• hazardous,
• smaller,
• concomitant,
• indirect,
• neonatal,
• sexual,
• healthy,
• contagious,
• cooccurring,
• widespread,
• unpopular,
• incurable,
• infective,
• ongoing,
• pathological,
• carcinogenic,
• temporary,
• conventional,
• occupational,
• destructive,
• catastrophic,
• popular,
• vulnerable,
• communicable,
• congenital,
• supporting,
• painful,
• united,
• primary,
• large,
• current,
• resistant,
• animal,
• prevalent,
• preventable,
• societal,
• intrauterine,
• parasitic,
• opportunistic,
• tropical,
• endemic,
• pathogenic,
• bacterial,
• obstetric,
• threatening,
• emergent,
• critical,
• epidemic,
• adult,
• complex,
• possible,
• micro,
• fatal,
• extracurricular,
• maternal,
• significant,
• acute,
• major,
• immunosuppressive,
• potential,
• active,
• important,
• descriptive,
• global,
• related,
• special,
• virulent,
• unknown,
• aggressive,
• underlying,
• educational,
• diseased,
• adverse,
• immediate,
• worthy,
• heterogeneous,
• multiple,

Simple Categories for null:

• infection,
• pathology,
• death,
• condition,
• microorganism,
• illness,
• immunity,
• bacteria,
• virus,
• danger,
• microbe,
• addiction,
• pathogen,
• bug,
• item,
• host,
• group,
• niche,
• agent,
• status,
• entity,
• cell,
• trait,
• nature,
• activity,
• organism,
• abnormality,
• form,
• individual,
• affliction,
• state,
• disorder,
• attribute,
• retrovirus,
• difficulty,
• part,
• person,
• germ,
• relationship,
• time,
• level,
• thing,
• malady,
• harm,
• cause,
• situation,